- Buyers Guide
Five-bit Digital Attenuator
The model AD280-25 GaAs IC FET five-bit digital attenuator operates over the frequency range from DC to 2 GHz and features a least significant bit of 0.5 dB and a total attenuation of 15.5 dB. Bit values are 0.5, 1, 2, 4 and 8 dB. The attenuator is designed for applications requiring high attenuation accuracy, low insertion loss and low intermodulation, including cellular radio, wireless data, wireless local loop and other gain level control circuits. The device offers low DC power consumption and is manufactured in a low cost SOIC-16 plastic package. Price: $5.10 (10,000).
(800) 290-7200, ext. 306 or (508) 894-1904.
75 W BNC/Switch Connector
This BNC/switch coaxial connector is a bulkhead, right-angle receptacle connector combined with an integral switch that features an impedance of 75 W and operates from 0 to 4 GHz with an SWR of 1.5. Designed for use in data, video and telecommunications equipment to provide a shielding signal and isolated ground signal, the connector is ideally suited for systems requiring routing of a signal back into the PC board when the port is not in use.
Amphenol, Communication and Network Products Division,
High Power Splitter/Combiner
The model 4ATTA0405 four-way high power AdrenaLine“ splitter/combiner for modular amplifiers, including DCS, PCS and W-CDMA applications, covers the 1.8 to 2.2 GHz frequency range. Maximum insertion loss is 0.40 dB, amplitude balance is +/-0.4 dB, isolation is better than 25 dB and return loss is 22 dB (min). The unit is available with SMA connectors for laboratory use or with production-ready solder strap-mounting pads.
Anaren Microwave Inc.,
East Syracuse, NY
Flexible Coaxial Cable
The HELIAX“ VXL5-50 extra flexible 7/8-inch coaxial cable for wireless applications has a minimum bend radius of 3.5 inches and is suitable for continuous cable runs from the base station cabinet to the antenna as well as installation in difficult areas such as lift shafts, monopoles and collocated sites. The cable is 15 percent lighter than standard 7/8-inch cable products. When used as the main feeder line, it requires fewer connectors and no jumpers, lowering insertion loss and minimizing installation time.
Orland Park, IL
Edge-mount SMA Connectors
These edge-mount surface-mount array (SMA) connectors fit on the end of a PC board and can be soldered directly to the board circuitry without drilling the boards. The connectors feature a compact base size that allows dense packaging (as close as 0.275" between centerlines). Constructed with stainless-steel bodies, Teflon“ and beryllium-copper contacts, the connectors are readily available to fit boards up to 0.62" thick, with units for thicker boards available on special order. All metal parts are gold plated to meet MIL-PRF-39012 requirements, and interface dimensions are per MIL-STD-348. Gold-plated brass bodies are also available for greater economy in commercial applications.
Applied Engineering Products,
New Haven, CT
High Power Forced Air-cooled Loads
The Digital Air™ series forced air-cooled loads are optimized for UHF digital broadcast applications and offer low SWR of < 1.5 (typ) and < 1.1 (max) across the entire UHF DTV band of 470 to 890 MHz without any custom tuning. Other features include quiet operation, cool-to-the-touch exterior surfaces, ductable exhaust and the capability to handle high peak-to-average power ratios of > 10 dB (typ) of digital broadcast. Impedance is 50 W (nom). The models available are 50 W devices with continuous power ratings of 5, 10, 15 or 25 kW. Manual and automatic fan modes and an interlock for overload protection are included.
Bird Electronic Corp.,
The model PD5532 CDMA duplexer provides a 10 MHz window in the base transmit and base receive frequencies of the AMPS A-band cellular spectrum. Loss is < 1 dB, which maximizes sensitivity and effective radiated power. The unit employs two six-pole filters in a duplex configuration, two transmission zeroes in the transmit filter and a single transmission zero in the receive filter.
Celwave, a division of Radio Frequency Systems Inc.,
Ultra-low Profile Inductors
The LPT3305 series Power Wafer™ ultra-thin, high performance power inductors are designed for hand-held electronic devices, type-1 PC cards, disk drives and other low profile power applications. Eleven inductance values are available from 1 to 47 mH and saturation current ratings range up to 6 A, with RMS current ratings up to 1.6 A and low stray electromagnetic interference. Each inductor’s small footprint (0.35" x 0.40") takes up to 25 percent less board space than competitive low profile inductors. Its ceramic case is just 1.8 mm high. Price: 50¢ to 93¢ each (10,000). Delivery: stock.
38 GHz Diplexer
This diplexer provides low insertion loss with high harmonic rejection and passbands that can be tuned in the range of 37 to 39.5 GHz, with a bandwidth of 640 MHz and a transmit-to-receive spacing of 1260 MHz. Harmonic rejection exceeds 40 dB and the operating temperature range is –30° to +70°C. Size: 4.13" x 1.27" in WR28 waveguide.
Filtel Microwave Inc.,
Vaudreuil-Dorion, Quebec, Canada
Dual Concentric Attenuator
The model 50DR-087 attenuator covers a frequency range of DC to 2000 MHz with an attenuation range of 0 to 110 dB in 1 dB steps. Attenuation accuracy is +/-0.5 dB (one percent) from DC to 500 MHz and +/-0.5 dB (three percent) from 500 to 2000 MHz. (Attenuation increases when knobs are rotated clockwise.) Insertion loss is 0.5 dB (max) at DC to 1000 MHz and 1 dB (max) at 1000 to 2000 MHz, and input power is 2 W (avg) and 1000 W (peak). Operating temperature range is –20° to +85°C. Available connectors include TNC, N, SMA or BNC female.
JFW Industries Inc.,
Two-stage Power Hybrid Line
The HIT™ (high impedance technology) two-stage power hybrid line provides power amplification for applications traditionally covered by power transistors. The HIT approach results in a 50 W drop-in gain block, saving design time and conserving space. The first two-stage parts are designed for PCS applications in the 1.9 to 2.0 GHz frequency range, and the 1 dB compression points of the two parts are 10 and 25 W. Both are designed for high linearity under CDMA conditions with good gain flatness and phase linearity. Nominal gain is 25 dB. Size: 1.1" x 1.1".
Ericsson RF Power Products,
San Jose, CA
PIN Diode Switch
The model SWX-A14S PIN diode switch is designed for high reliability and commercial applications and features a surface-mount package measuring only 1.00" x 0.55" x 0.25". IP3 is +35 dBm. The switch operates at power levels up to +27 dBm over the 2.2 to 2.3 GHz frequency range and provides a minimum 45 dB isolation, insertion loss of 0.7 dB and rise time of 50 ns. Strain relief contacts assure reliable operation when mounted on an external PCB over the –30° to +125°C temperature range. TTL-compatible drivers are included, and the switch operates from a single 5 V DC supply.
KDI/triangle Corp., an MCE company,
(973) 887-8100, ext. 500.
The model EARN2830K-01 gain equalizer minimizes the effects of loss slope, SWR ripple and overall system gain variation. The passive microwave equalizer operates over the 28 to 30 GHz frequency range and is available in either fixed or adjustable configurations. Integrated isolators, K connectors and six sections of adjustment are also featured, allowing the shaping of the unit’s loss characteristics to be complementary to either gain slope or ripple gain variation over the operating band.
MICA Microwave Corp.,
San Jose, CA
The model SMA006 RP-SMA connector features a unique body style, which provides a wide variety of mounting options and accommodates a wide variety of metal or plastic case styles and thicknesses. Designed for edge attachment to a user’s PCB, the connector meets FCC Part 15 standards for both licensed and unlicensed applications. Price: less than $3 (production quantities).
Grants Pass, OR
14 - 14.5 GHz Drop-in Isolator
The model 1425IED drop-in isolator is designed to provide 23 dB isolation with low insertion loss of 0.4 dB over the frequency bandwidth of 14 to 14.5 GHz. SWR is 1.3 over the frequency bandwidth, and the unit can be operated from –20° to +85°C. The isolator provides good assembly yield during system integration. Size: 0.35" x 0.475" x 0.150".
Morgan Hill, CA
Transceiver Harmonic Filter
The model 12086 filter is used to pass the C-band receiver frequencies of 3.7 to 4.2 GHz, with an insertion loss of 0.05 dB (typ) and 0.1 dB (max). The unit provides a minimum 50 dB rejection of the uplink frequencies of 5.9 to 6.4 GHz and an SWR of 1.1 across the entire passband. WR-229G flanges are standard, but other connectors are available. The filter is ideal in transceiver applications where isolation of the transmit and receive frequencies is critical.
Microwave Filter Company Inc.
(MFC), East Syracuse, NY
(800) 448-1666 or (315) 438-4747.
These 13 to 14 GHz microstrip isolators feature polished ferrite with thin-film gold on copper and are suitable for regular tin-lead solder (for solderable softboard interface), gold wire or gold ribbon bonding for thin-film circuits. The units have 10 W loads; loads with rated power up to 25 W are available. Microstrip models to over 100 GHz are available.
San Jose, CA
7-16 RF Coaxial Adapters
These custom-fabricated 7-16 RF coaxial adapters feature in-series cable types such as right-angle male-to-female for fitting into tight spaces, male-to-male for solving gender problems and between-series adapters for mating 7-16 connectors to other series such as C, HN, N, SQ, SC, 7/8 and 1-5/8 EIA connectors in various gender combinations. Constructed with nickel- or silver-plated brass bodies, silver-plated beryllium-copper female contacts and silver- or gold-plated brass male contacts, the adapters conform to DIN 47223, IEC 169-4, VG 95250 and CEEC 22 190 specifications and are rated up to 2700 VRMs for telecommunications, instrument and test equipment applications.
138 - 150 MHz Isolators and Circulators
These drop-in and coaxial isolators and circulators cover the full 138 to 150 MHz frequency range in a small, compact size. Isolation is 15 dB (min) (18 dB at +25°C), insertion loss is 0.6 dB (max) (0.5 dB at +25°C) and SWR is 1.4 (max) (1.3 at +25°C). Operating temperature range is –40° to +85°C. Size: 2.00" x 2.54" x 0.75". Delivery: stock to four weeks (ARO).
Alcatel Ferrocom Ferrite Products,
San Jose, CA
2 - 18 GHz SP16T PIN Diode Switch
The model 1744 broadband SP16T PIN diode switch covers the 2 to 18 GHz frequency band and exhibits a maximum insertion loss of 6.0 dB and an isolation of 60 dB to 14 GHz and 50 dB to 18 GHz. The switch operates over a temperature range of –40° to +85°C and has power supply voltages of +5 and +15 V DC with a switching speed of 500 ns (max). Size: 4.50" x 4.00" x 0.75".
(516) 226-8900, ext. 236.
Miniature Digital Threshold Detector
The model 9030-K06 miniature digital threshold detector exhibits a flat response over 2 to 18 GHz. Input SWR is 3 and response time is 30 ms (typ). The threshold detector is adjustable from –25 to –10 dBm using a single external resistor and is temperature compensated from –55° to +85°C. Operating voltage is +5 V DC. Size: 0.75" x 0.55" x 0.19", excluding field-replaceable SMA flange connectors.
Robinson Laboratories Inc.,
50 GHz Coaxial Transfer Switch
The model HP 87222E 50 GHz four-port coaxial transfer switch is designed for high frequency applications and features repeatability, low insertion loss and high isolation. The transfer switch is suitable for use in a variety of applications, including terminated single-pole double-throw, a drop-out switch, switching two inputs to two outputs or signal reversal switching. Optional solder lugs and mounting brackets are available. Price: $1995.
Palo Alto, CA