Wireless Design & Development articles from April 2003

Wireless Design & Development archives from April 2003

Boost converters.(Vishay Intertechnology's FX5545G006 and FX5545G106)(Brief Article)
April 1, 2003... FunctionPAK[TM] synchronous DC/DC boost converters, model numbers FX5545G006 and FX5545G106, convert input voltage ranging from 2.5 V to 6 V to low-ripple output voltages ranging from 3.3 V to 6 V. Output power and maximum current are 7.5 W and...

Power amplifier transistors.(Agere Systems)(Brief Article)
April 1, 2003... Agere introduces 21 transistor products for the wireless base station power amplifier market. With silicon wafers that are ultra-thin, the transistors are more thermally efficient (cooler), reducing the number of cooling fans needed and the...

WLAN measurement software.(Anritsu Company)(Brief Article)
April 1, 2003... Anritsu introduces high-end analysis software that allows 5 GHz OFDM signals used in WLAN devices to be accurately measured in accordance with IEEE 802.11 a with a single instrument. The software can be used with the MS268x series and MS860x...

Cost-effective cables.(Semflex's BPE Series )(Brief Article)
April 1, 2003... The BPE Series is designed for 50 ohm applications up to 6 GHz where microwave performance characteristics need to be managed but temperature range and higher frequency performance of PTFE dielectric is not required. Available in sizes from...

Technology paves the way. (Upfront).
April 1, 2003... As I watched the war unfold last Wednesday night, it seemed Impossible that 10 years had passed since the first Gulf War. I don't recall watching it on TV. Surely there weren't live cameras waiting for the action to begin. There weren't...

Cable systems. (What's Hot).(Corning Cable Systems' Evolant Solutions )(Brief Article)
April 1, 2003... Corning Cable Systems introduces Evolant Solutions for wireless networks. The MCS[R] Road Cable product set is designed for rapid installation. They provide cost and time savings in cable installation. The OptiFit[R] cable assembly offers...

Surface mount transducer. (What's Hot).(Projects Unlimited's SMT-4203D-T/R)(Brief Article)
April 1, 2003... The SMT-4203D-T/R surface mount transducer measures 7.5 X 7.5 mm with a height of 2 mm. It produces 85 dB at 2700 Hz at 10 cm based on 3.6 V square wave. Coil resistance is 12 Ohms and 120 mA is the maximum current. The device is compatible...

Internal antennas. (What's Hot).(Centurion Wireless Technologies' Revie line )(Brief Article)
April 1, 2003... Centurion announces at the Revie[TM] line of internal antenna solutions to support data and voice applications over 1800/1900 and 800/900 GHz. The Revie's 1800/1900 and 800/900 GHz operating bands support data applications in industrial,...

DC/DC converters. (What's Hot).(Tyco Electronics Power Systems' addition to the Austin Lynx series)(Brief Article)
April 1, 2003... Tyco announces the addition to the Austin Lynx series, a 12 V input non-isolated DC/DC converter that allows engineers to minimize board space while seeking to power low-voltage components. This module is designed to support intermediate bus...

WLAN antennas. (What's Hot).(NTK Technologies' MAC2450A5362AA01/02 ceramic dielectric chip antennas)(Brief Article)
April 1, 2003... NTK introduces a line of ceramic dielectric chip antennas. The dual band, MAC2450A5362AA01/02 supports both 2.4 - 2.5 GHz and 4.9 - 5.825 GHz wireless devices operating under the IEEE 802.11a, b, and g bands. The size of the device is 13.0 X...

SMD inductors. (What's Hot).(Datatronic Distribution's DR349 Series )(Brief Article)
April 1, 2003... The DR349 Series SMD inductor features low seated profiles from 0.095" (2.4 mm) maximum to 0.198" (5.3 mm) maximum above the circuit board and operates over the temperature range of -20[degrees]C to +80[degrees]C. The DR349 Series SMD inductors...

Analysis software. (What's Hot).(Rohde and Schwarz's Rodas)(Brief Article)
April 1, 2003... The Rodas analysis software provides a tool for the automatic evaluation and graphical display of mobile radio network measurement data. The software is specifically used for evaluating the data supplied by mobile test systems that measure...

SMT resistors. (What's Hot).(from IMS)(Brief Article)
April 1, 2003... IMS introduces the S family of surface mount resistors. The S series offer customers the ability to operate circuits at higher power levels without having to redesign the circuit or increase the component size. Resistor sizes include 0402,...

Trimmer capacitors. (What's Hot).(Sprague-Goodman Electronics)(Brief Article)
April 1, 2003... Sprague-Goodman introduces compact, low profile, surface mount FILMTRIM[R] plastic dielectric trimmer capacitors. These dielectric trimmer capacitors are available in nonmagnetic versions. The series offers four capacitance ranges from 0.5 -...

Electrical performance of microvia PCB materials: substrates based on FR4 core constructions utilizing low loss microvia dielectrics can offer low cost, high performance. (Dielectrics).(Industry Overview)
April 1, 2003... High density module substrate and PCB requirements are driving the need for high density interconnect (HDI) design capabilities using laser microvias (note that "HDI", "high density", and "microvia" are often used synonymously when describing...

Digital frequency synthesizer module: TRAK Microwave. (New Product).(Model 9021)(Brief Article)
April 1, 2003... This module may be used in Model 9000 GPS time and frequency units used for Wireless, space, and defense applications. The Model 9021 digital frequency synthesizer features four direct digital synthesizers each frequency programmable from the...

Enclosure design: Polycase. (New Product).(SL Series)(Brief Article)
April 1, 2003... The SL Series has two additional sizes with deeper covers for extra versatility and function. The family of SL designs meets UL's flame retardant rating of UL 94-5VA and features a removable top with insert area to make it ideal for custom...

CMOS single inverter: STMicroelectronics. (New Product).(4LX1G04)(Brief Article)
April 1, 2003... The 74LX1G04 is a low voltage CMOS single inverter fabricated with sub-micro silicon gate and double-layer metal wiring [C.sup.2]MOS technology. It is ideal for 1.65 to 5.5 [V.sub.CC] operations and low power and low noise applications. The...

MMIC amplifiers: Hittite Microwave Corporation. (New Product).(and HMC461LP3 )(Brief Article)
April 1, 2003... Hittite Microwave introduces the HMC455LP3 and HMC461LP3 amplifiers. These MMIC amplifiers are ideal for a variety of PCS/3G wireless infrastructure applications offering +19 dBm and +20 dBm WCDMA channel output power respectively at -45 dBc...

Universal noise attenuator: Vicor Corporation. (New Product).(QuietPower)(Brief Article)
April 1, 2003... This QuietPower[TM] output tipple attenuation module, designated QPO-1, uses active filtering in a SIP package to provide >20 dB of conducted differential noise attenuation from 60 Hz to 500 kHz. This module is rated for 10 Amps and can be used...

Simulation Software: Ansoft Corporation. (New Product).(SIwave )(Brief Article)
April 1, 2003... SIwave simulation software is designed for the advanced modeling of IC packages and PCBs. SIwave allows design engineers to characterize simultaneous switching noise, power and ground bounce, resonances, reflections and coupling between traces,...

Cables and Connectors: Power Dynamics, Inc. (New Product).(Brief Article)
April 1, 2003... The Serial ATA, a miniaturized version of the Parallel ATA but with double its data transfer capability is now available. With a transfer speed of 150 MB/sec. and a 7-pin interface, the Serial ATA will foster development of smaller packages...

Thin film substrates: OhmCraft. (New Product).(Brief Article)
April 1, 2003... OhmCraft's thin film resistor-conductor substrates are manufactured using TantaMax[TM] high reliability low TCR thin film technology. The thin films are based on a multi-layer composite film having an overlayer of tantalum nitride which imparts...

SMT power inductor: Renco Electronics, Inc. (New Products).(RL-7200 Series )(Brief Article)
April 1, 2003... The RL-7200 Series is 1 mm high and has a small footprint of 7.4 x 7.3 mm. This series covers a wide range of inductance values from 1 uH to 560 uH. The completely shielded design eliminates EMI. The RL-7200 inductor series has an operating...

Power manager IC: Linear Technology Corporation. (New Products).(LTC4410)(Brief Article)
April 1, 2003... The LTC4410 is a USB power manager IC in a ThinSOT[TM] package, which enables simultaneous battery charging and system operation of a Li-Ion powered USB peripheral from a USB host. Compared to conventional methods, the LTC4410 powers the system...

Coaxial switch: Dow-Key Microwave Corporation. (New Products).(P/N 461H-480823A-3)(Brief Article)
April 1, 2003... P/N 461H-480823A-3 is an 18 GHz CANBus-controlled SP6T Smart Switch with internal 50 [OMEGA] termination. DC characteristics include 22 - 26 V DC (24 V DC nominal operating current is 250 mA typical at 20[degrees]C) operation. Equipped with a...

Two chip solution: Zetex Inc. (New Products).(ZXFV4583 sync separator and ZXFV4089 DC restoration amplifier )(Brief Article)
April 1, 2003... The ZXFV4583 sync separator and ZXFV4089 DC restoration amplifier provide a two chip solution for the management of composite video signals. Acting as a black level clamp, the ZXFV4089 provides brightness level stability in video systems...

Programmable power supply: Elgar Electronics Corporation. (New Products).(DCSE 3 kW)(Brief Article)
April 1, 2003... The DCSE 3 kW incorporates high frequency current mode switching for minimum tipple and is packaged in a compact 3.5 inch high chassis. The DCSE 3 kW is available in multiple voltage ranges from 8 to 150 V DC with optional IEEE-488 or isolated...

Mounting kit: Antenex. (New Products).(Brief Article)
April 1, 2003... Antenex has added a gold plated center contact to its mobile antenna mounting kit offering. With an all brass mount structure and gold center contact, these mounting kits are corrosion resistant. The gold plating center contact provides for...

DC/DC converters: Ericsson. (New Products).(PKJ4000E series modules)(Brief Article)
April 1, 2003... The PKJ4000E series modules, with 48 V inputs, are available in single output modules and are suitable for on-board power solutions in distributed power architectures in telecom, datacom, and other demanding applications. The PKJ4810E PI is an...

RF inductors: Gowanda Electronics. (New Products).(CF1008)(Brief Article)
April 1, 2003... The CF1008 surface mount inductor series has low inductance values and high current ratings. The models provide inductance values ranging from 0.10 microHenries to 1 microHenry. Current ratings (DC maximum) from 1392 mAmps to 102 mAmps. ...

Switching chips: Zarlink Semiconductor. (New Products).(ZL 50418 family )(Brief Article)
April 1, 2003... The ZL[TM]50418 family of four devices integrates 16 Fast Ethernet traffic ports with two Gigabit Ethernet ports to deliver non-blocking throughput at a maximum 7.2 Gb/s. These switches forward up to 10.712 Mpps at wire speed. Each ZL50418 port...

Drop-in isolators: Raditek. (New Products).(KP1 series )(Brief Article)
April 1, 2003... The KP1 series is a stripline drop-in isolator that covers 2070 to 2210 MHz. This isolator is designed for extreme IMD performance with better than -82 dBc and -92 dBc typical. With specifications of isolation of 21 dB minimum, insertion loss...

Selectable output VCXO:Connor-Winfield Corporation. (New Products).(VPLB434J3E)(Brief Article)
April 1, 2003... Connor-Winfield introduces a surface mount, selectable output VCXO suitable for use in telecom applications. The engineer can specify 3 frequency options at the design stage in the 100 to 200 MHz range. The VPLB434J3E meets SONET phase jitter...

Battery contact: Components Corp. (New Products).(BC-501-1 SMT )(Brief Article)
April 1, 2003... Developed for portable electronic devices, the BC-501-1 SMT battery contact produces high-reliability spring contact due to its design. The free standing BC-501-1 contacts can be randomly placed on a circuit board. The BC-501-1 is manufactured...

Ferrite chip inductors: Frontier Electronics. (New Products).(Brief Article)
April 1, 2003... These large, wire wound ferrite chip inductors fill the needs of low power filter processing and higher power signal processing circuits. They are designed for optimum performance in the 10 to 100 MHz range. Typical applications range from...

Electrically conductive epoxy: Tra-Con, Inc. (New Products).(Brief Article)
April 1, 2003... TRA-DUCT LX80102 is a quick setting, two-part, silver-filled epoxy that offers excellent electrical conductivity. It sets in three minutes and achieves full cure in 24 hours at room temperature. www.tra-con.com; (800) TRACON1 * Write...

EMI filter array. (Filters/Mixers).(California Micro Devices CSPEMI400 family)(Brief Article)
April 1, 2003... The CSPEMI400 family of components provide EMI filtering and ESD protection for data ports in cell phones, PDAs, and notebook computers. The devices features: greater than 30 dB of attenuation at 1 GHz: [+ or -]25 kV ESD protection using the...

Surface mount filters. (Filters/Mixers).(Lorch Microwave's Z-Pack Series)(Brief Article)
April 1, 2003... Lorch Microwave introduces the Z-Pack Series of surface mount filters. The Z-Pack leaded surface mount filters are available in bandpass, highpass, lowpass, and band reject models. The Z-Pack Series filters feature small size, low profile (.25"...

Active, current reuse mixer. (Filters/Mixers).(Current RF CRF2100)(Brief Article)
April 1, 2003... The CRF2100 is a highly linear, broadband, current reuse, low supply voltage active mixer. The CRF2100 can operate from supply voltages as low as +1.3 volts and can be configured to consume little, if any, additional system power. The output...

Tubular Bessel Filter. (Filters/Mixers).(RLC Electronics)(Brief Article)
April 1, 2003... RLC Electronics offers 4th Order Tubular Bessel low pass filters with 3 dB cutoffs at up to 2X cutoff of the company's LB series. Computer design and tubular construction allow the filter to maintain excellent delay characteristics with...

Autotuned Filter. (Filters/Mixers).(K and L Microwave)(Brief Article)
April 1, 2003... The UHF Autotuned Filter is a high "Q" baseband filter that provides a narrow 3 dB BW, while covering the 225 to 400 MHz frequency band. When configured with a UHF transceiver, the device provides filtering solutions for field applications...

Low pass filter. (Filters/Mixers).(Brief Article)
April 1, 2003... The MAX7440/MAX7441/MAX7442 are 6-channel video reconstruction filters. They are ideal for anti-aliasing and digital-to-analog (DAC) reconstruction video applications. Each channel of the devices combine a continuous-time low pass filter with...

Training software: National Instruments. (New Products).(Brief Article)
April 1, 2003... Engineers can train the newest version of Optical Character Recognition (OCR) software to read a variety of fonts and symbols. OCR software allows engineers to access low-level parameters with an easy-to-use training interface, adding...

Bluetooth RF device: Murata Electronics. (New Products).(Brief Article)
April 1, 2003... Murata introduces a small Bluetooth RF device for CDMA applications. Measurements of the device are 8 x 6.5 X 1.6 mm. The LMBTA068 will benefit engineers developing CDMA handsets and PC cards with Bluetooth functionality. The device allows...

Shielded cables: Nemal Electronics International. (New Products).(Brief Article)
April 1, 2003... These audio snake cables are for use in broadcast and high end audio applications requiring a plenum rated cable. Part number SN1624PL consists of 16 individually shielded and jacketed pairs with an overall jacket. The digital versions (24XPL...

Coaxial cable assemblies: Times Microwave Systems. (New Products).(Brief Article)
April 1, 2003... Tunes Microwave announces flexible, low loss coaxial cable assemblies with low levels of Passive Intermodulation Distortion or PIM. These assemblies are built from T-COM[R] cable and precision connectors. The construction of T-COM cable...

Digitally controlled VGA: Analog Devices, Inc. (New Products).(AD8370)(Brief Article)
April 1, 2003... The AD8370 provides a 700 MHz bandwidth (-3 dB), enabling the part to be used at intermediate frequencies up to 380 MHz. The AD8370 enables designers to select between two gain control ranges (a high-gain mode adjustable from +6 to +34 dB and a...

Solid state power amplifier: Aethercomm. (New Products).(Brief Article)
April 1, 2003... Part Number SSPA 4.4-5.0-25 is a high power C band solid state power amplifier that operates from 4.4 to 5.0 GHz. It offers a minimum of 25 watts of saturated RF power at 65[degrees]C base plate temperature. This PA has a typical small signal...

Permanent-mount antennas: Antenna Factor. (New Products).(Brief Article)
April 1, 2003... The LP series antennas are 1/4-wave antennas that mount directly to a product's PCB via a single screw. The antennas are available in standard or custom frequencies within the 260 MHz - 1 GHz range. A precision internal helical element...

Auto-Programming system: BP Microsystems. (New Products).(Brief Article)
April 1, 2003... BP Microsystems introduces the 3700 Mark 2 Automated Programming system with universal support to complement its full line of automated programming systems under its new 7th generation of products. The 3700 Mk2 (Mark 2) is a fine pitch...

Surface mount VCXO: Fox Electronics. (New Products).(Brief Article)
April 1, 2003... The FVS25AXT is a 3.3 V, low profile, surface mount VCXO with a pullability of [+ or -]100 ppm and a frequency range of 2 through 52 MHz. Frequency stability of the oscillator is [+ or -]50 ppm, and standard operating temperature...

Phase locked sources: Miteq, Inc. (New Products).(Brief Article)
April 1, 2003... These BCO series phase locked sources offer excellent phase noise and spurious performance in a 2.25 x 2.25 x .55 inch package. Available in frequencies from 500 MHz - 14 GHz, it operates from either an external reference or internal TXXO with...

Transceiver module: Radiotronix, Inc. (New Products).(Brief Article)
April 1, 2003... The EWD-900-HDTC is a fully integrated half duplex wireless FSK data transceiver and is suitable for the United States (902 - 928 MHz) or Europe (868 MHz). The basic design of the transceiver can be scaled from 300 MHz to 1 GHz. The transceiver...

Q-band active multiplier: Spacek labs. (New Products).(Brief Article)
April 1, 2003... Model AQ-4X active multipliers are designed to customer's individual specifications. It operates with the 18 - 110 GHz range. This AQ-4X is optimized for an input signal of 10 to 10.625 GHz with a signal level of +17 dBm. Output signals are 40...

Getting the best bite from' Bluetooth: the move towards application specific embedded processors. (Bluetooth).
April 1, 2003... Bluetooth technology has started down the road to ubiquity. Within a year, Bluetooth wireless interconnectivity will be a standard feature in new PCs, printers, PDAs, pagers, mobile headsets, and more. Within the decade, Bluetooth will be...

SFP transceiver: dataMate products, Methode Electronics, Inc. (New Products).(Brief Article)
April 1, 2003... The RJ45 SFP (small form-factor pluggable) transceiver offers gigabit Ethernet speeds over Category 5 unshielded twisted-pair copper cable. The transceiver operates from a single +3.3 V power supply, and is packaged in a die cast metal housing...

Data acquisition systems: Acqiris USA. (New Products).(Brief Article)
April 1, 2003... The new Cougar series consist of a modular digitizer package housed in a compact (342 x 346 x 106 mm) 6U CompactPCI 3-slot crate; a fast interface (100 Mbytes/s) that connects directly to any PCI slot of a Pentium-based PC; one or more 12-bit...

A/D board: DATEL, Inc. (New Products).(Brief Article)
April 1, 2003... Model PCI-417N features 32, 80 kHz, analog input channels with 14-bit A/D resolution. Full scale input voltage ranges of [+ or -] 5 V or [+ or -] 10 V are selectable per channel. An on-board A/D memory system prevents sample loss when streaming...

Coaxial switches: RLC Electronics, Inc. (New Products).(Brief Article)
April 1, 2003... RLC's micro miniature coaxial switch is a single pole two position type. The switch incorporates SMP (GPO) "push on" connectors to allow high-density packaging and excellent electrical performance through 26.5 GHz, also available with pin...

Head screws: Micro Plastics, Inc. (New Products).(Brief Article)
April 1, 2003... These low cost fasteners are manufactured in nylon 6/6 and feature electrical insulation, vibration, and abrasion resistance, chemical and corrosion resistance, low thermal conductivity, non-magnetic properties and have high strength-toweight...

Cceramic capacitors: AVX Corporation. (New Products).(M123 Series)(Brief Article)
April 1, 2003... M123 Series capacitors offer design and component engineers technology for SMD processing and applications requiring space-level reliability. These MIL-qualified ceramic capacitors are designed for use in critical frequency applications, timing...

Handheld test set: IFR. (New Products).(IFR 4000)(Brief Article)
April 1, 2003... The IFR 4000 is a navigation communications ramp test set. IFR 4000 is a selfcontained, handheld unit designed for ramp testing, but can also be used in bench test applications. It performs functional testing, signal generation and calibration...

Power amplifier modules: Agilent Technologies, Inc. (New Products).(Brief Article)
April 1, 2003... The ACPM-7813 operates over the 824 MHz to 849 MHz frequency range, and features +28.5 dBm linear output power at 3.4 V. Supply voltages between 3.2 V and 4.2 V, with minimum performance reduction at 3 V. The ACPM-7833 operates over the 1850 to...

Coaxial switch matrix: Dow-Key Microwave Corporation. (New Products).(Brief Article)
April 1, 2003... Dow-Key Microwave introduces a CANbus-based coaxial switch system with Ethernet, GPIB, RS.232, RS485, and CANbus control interfaces. This matrix performs up to 18 GHz and can be configured with up to four SP10T switch assemblies. Each unit is...

Low pass filter: K&L Microwave, Inc. (New Products).(Brief Article)
April 1, 2003... This printed low pass filter maintains a fiat passband from DC to 18000 MHz with stopband rejection levels of 55 dB from 21000 MHz to 24000 MHz. The typical VSWR of the unit is 2.0:1 across 80% of the operating passband with insertion loss of...

Power converters: Magnetek Power Electronics Group. (New Products).(Brief Article)
April 1, 2003... The FE Series converter is a 24 V DC to 48 V DC telecom power converter for cellular base stations and fiber and microwave backhaul installations. The FE1D DC/DC converter provides 48 V DC regulated output from a 24 V DC power source. Input...

Quadrature demodulator: Analog Devices, Inc. (New Products).(AD8348)(Brief Article)
April 1, 2003... The AD8348 high performance broadband quadrature demodulator is designed to enable IF-to-baseband conversion from 50 MHz to 1 GHz. In addition to the demodulator, which includes a dual mixer core and local oscillator phase splitter, the AD8348...

Inverter transformer: J.W. Miller magnetics. (New Products).(Brief Article)
April 1, 2003... J.W. Miller introduces a cold cathode fluorescent lamp (CCFL) inverter transformer series in a surface mount package. This device is an integral component used in power supplies for producing the high voltage needed to initiate lamp operation...

Optical alignment stage: Palomar Technologies. (New Products).(FAST)(Brief Article)
April 1, 2003... The Fast [TM] 6, a 6-axis optical alignment system is for test and production applications. The FAST [TM] 6 provides high resolution, fast, accurate, and reliable assembly of an optical component, fiber, or fiber array to a device. Non-contact,...

Hybrid couplers: Anaren Microwave, Inc. (New Products).(Brief Article)
April 1, 2003... This line of hybrid couplers are specialized for high-power UHF applications. The units are also available in models suited tO AMPS, GSM, DCS, PCS, and 3G systems. The 3 dB hybrid coupler measures 1.0 x 0.5" (25.4 x 12.7 mm) and handles power...

Bus controller: NEC Electronics. (New Products).(TINA)(Brief Article)
April 1, 2003... NEC Electronics announces a time-triggered protocol (TTP) bus controller ASIC, named TINA. With TTP functionality, the bus controller allows signals to be generated based on time slots rather than on standard external arbitration events. The...

DC/DC Converters: Cherokee International. (New Products).(Brief Article)
April 1, 2003... The Eagle product line delivers high currents of 25 amps at efficiencies as high as 91%. These single output converters have a high, power density of 93 watts per cubic inch and can handle input voltages across a wide input range from 36 to 75...

Single-use fuse: Tyco Electronics, Raytheon Circuit Protection. (New Products).(FT600 fuse)(Brief Article)
April 1, 2003... The FT600 fuse series provides a practical overcurrent protection solution. The device offers low temperature-rise performance under sneak current fault events to prevent damage to circuit traces or multi-player boards, and when used in...

MMIC VC0: Hittite Microwave Corporation. (New Products).(HMC384LP4)(Brief Article)
April 1, 2003... The HMC384LP4 is ideal for cellular/3G and broadband wireless data systems applications. This MMIC VCO requires no external components, consumes 35 mA from a single supply of +3 V, and provides +3.5 dBm buffered output power. The low phase...

Photodetectors: UDT Sensors, Inc. (New Products).(YAG)(Brief Article)
April 1, 2003... UDT Sensors, Inc. introduces photodetectors with large sensing areas. The YAG photodetectors are optimized for high speed operation and high responsivity at 1064 nm. The YAG photodetector series offers two 4-element (Quad) detectors and two...

Introduction to spread spectrum communications: the aspects involved in spread spectrum techniques. (Spread Spectrum).
April 1, 2003... What is meant by spread spectrum? Many electrical engineers ask that question (especially "non-RF" engineers), en though literature and books on the subject abound, and explanations can be found at various websites. Indeed, simple explanations...

Directional couplers: MECA Electronics. (New Products).(Brief Article)
April 1, 2003... The 730-20-6 is a 20 dB coupler designed for X-band frequency applications (8.000-12.000 GHz) and measures 1.11 x 1.01 x 0.40 inches. Insertion loss is less than 0.1 dB. VSWR is 1.25:1. Directivity is 17 dB, and coupling accuracy is better than...

Downtilt antennas: Decibel Products. (New Products).(Brief Article)
April 1, 2003... Decibel Products introduces new versions of its 800/950 MHz log periodic antennas. This family now includes antennas with 45[degrees], 65[degrees], 800,. 90[degrees], and 105 [degrees] horizontal beamwidths. The antennas are equipped with the...

Driver products: siliconix incorporated. (New Products).(Brief Article)
April 1, 2003... The n-channel Si4738CY (20 V), Si4770CY (20 V), Si4724CY (30 V), Si4732CY (30 V), and Si4768CY (30 V) synchronous MOSFETS with integrated driver circuitry are designed to extend battery life and/or enable more efficient use of power. Each...

Quad-band receivers: RF Micro Devices, Inc. (New Products).(Brief Article)
April 1, 2003... The enhanced POLARIS[TM] TOTAL RADIO[TM] transceiver provides quad-band and direct conversion capabilities. The POLARIS transceiver is comprised of the RF6001 mixed-signal processor, the RF3133 power amplifier module with integrated power...

Receiver Sensitivity: too much of a good thing? (Sensitivity).
April 1, 2003... Some OEM radio manufacturers tout high receiver sensitivity as the miracle cure for increasing distance and reducing power consumption. They claim a receiver sensitivity of -110 dB delivers up to 10 times the distance of an industry-average...

Antennas product catalog: Mobile Mark. (New Literature).(Brief Article)
April 1, 2003... Mobile Mark introduces a 46 page catalog describing cellular on-window antennas. The product catalog provides a description, model numbers, and specifications for several product lines including the Mini-Mark Antenna, Magnet Mount Antenna...

Inductor Engineering Bulletin: Sprague-Goodman Electronics, Inc. (New Literature).(Brief Article)
April 1, 2003... Sprague-Goodman offers a 12 page Engineering Bulletin featuring their complete, expanded line of SURFCOIL[R] chip inductors. Bulletin SG-800G incorporates features, specifications, and outline drawings for the nineteen series that comprise the...