- Buyers Guide
Military Microwaves Supplement
Recent Advances in Radar Technology
Using Calibration to Optimize Performance in Crucial Measurements
GaAs SPDT Switch
The model AS125-73 SPDT GaAs IC switch is designed for use in dual-band/dual-mode digital handsets that require low voltage operation. The switch operates from DC to 2.5 GHz and offers low insertion loss of 0.4 dB (typ) at 900 MHz with control voltages of 0/3 V and low DC power consumption of 50 mW (typ), making it suitable for handset switching applications. Price: $1.24 (10,000).
(508) 628-4702, ext. 310.
The SHR series surface-mount inductors are designed to replace through-hole radial- and axial-leaded high current inductors. All components in the series are based on the same 0.44" (1.12 cm) square footprint with four different profile heights correlating to amperage, including 0.20", 0.32", 0.42" and 0.52" Inductances range from 1 to 10 mH in the smallest-current/smallest-profile group and from 1 to 1000 mH in the highest current group. The inductor chips are both flow and reflow solderable with high heat resistance. All cores in the series are composed of iron powder and carriers have UL94V-0 safety ratings. Cores are bonded to carriers. Price: 95¢ each (10,000). Delivery: stock to six weeks (ARO).
Associated Components Technology Inc. (ACT),
Garden Grove, CA
(800) 234-2645 (714) 265-4800.
Type N RF Coaxial Connectors
These type N RF coaxial connectors feature one-piece, machined bodies that exhibit a consistent appearance and provide the structural integrity of unitized construction. All one-piece type N receptacles are available with nickel or silver plating, or new Albaloy plating (a tin/zinc/copper composite plating that provides the durability and attractive appearance of nickel plating with the low intermodulation distortion of silver plating).
Delta Electronics Manufacturing Co.,
50-contact Hermetic Gas Tight Connector
The DRH series hermetic gas tight connector provides glass dielectric around each contact to maintain rated electrical characteristics. The glass also provides a heatproof shield in fabrication. The 50-pin contact design features eyelet termination on the backside. The connectors are fully intermateable with standard D sub plugs and accessories. A variety of contacts are available for PC and Flex circuits.
South El Monte, CA
26 - 40 GHz Isolator and Circulator
The models D3I2640 and D3C2640 isolator and circulator cover the 26 to 40 GHz frequency range and are designed for use in wireless commercial communications applications. The units feature an isolation of 14 dB (min) (15 dB (typ)), insertion loss of 1 dB (max) and SWR of 1.5 (max) (1.45 (typ)). Operating temperature range is from –20° to +65°C. A 2 W termination is standard on both units, which measure 0.50" x 0.70" x 0.50" and weigh 0.9 oz. Female K connectors are used for dependable mode-free operation. Available options include cascading for multijunction performance, electromagnetic interference (EMI) and humidity sealing. Electrical specifications can be improved over more narrow frequency bandwidths. Delivery: 50 days (50 units or less).
DiTom Microwave Inc.,
San Jose, CA
Drop-in Coaxial Isolators and Circulators
These coaxial isolators and circulators operate over a frequency range of 200 MHz to 18 GHz with octave bandwidths available for coaxial types. SMA female connectors and 1 W loads are standard. Other connectors and load powers also are available. VHF/UHF high power isolators and terminations can be ordered for power up to 300 W CW. In addition, stripline drop-in isolators and circulators are supplied over a frequency range of 400 MHz to 16.5 GHz.
Aerocomm Satellite Technology Co. Ltd.,
DPDT Transfer Switch
The model 111-2308 double-pole, double-throw (DPDT) transfer switch with SMA connectors is designed for cellular base stations as well as personal communications service (PCS)/personal communications network (PCN) and other wireless applications. The switch operates from DC to 3 GHz with an SWR of 1.2 (max) and is available in 12 or 28 V DC. Additional specifications include an insertion loss of 0.20 dB (max), isolation of 80 dB (min), power handling of 100 W CW and switching time of 20 ms. Delivery: stock to six weeks.
Dow-Key Microwave Corp.,
The V series connectors (part of the company’s EC3 connector series) offer good mechanical performance and easy attachment. The units use a heavy-duty silicone rubber o-ring to seal between the connector and cable. The remainder of the connector is supplied to the customer as only two pieces, eliminating the chance of losing the small components common to most connector designs. The captivated center pins in the connector body assure correct pin depth. In addition, the connectors offer return loss better than 35 dB and passive intermodulation below –160 dBc.
Eupen Cable USA,
500 W Flange Resistor
The model 31-1123 flange resistor handles 500 W and operates up to 1 GHz. Capacitance is low due to the unit’s size and the company’s internal matching. Standard resistance values of 50 and 100 W are available from stock.
Florida RF Labs Inc.,
The 7000 PIXIE series switch modules are based on National Instruments’ new PXI product line and offer a less expensive alternative to versa module Eurocard extension for instrumentation (VXI). Separate analog and digital ground planes are provided within all PCBs used in the switch products and shielded relays also are incorporated to ensure maximum signal integrity. Prices: range from $975 to $1395. Delivery: 30 to 45 days (ARO).
ASCOR Inc., a Giga-Tronics company.,
Miniature Highpass Filter
The model HPF100-1 highpass filter handles 25 W with 0.2 dB insertion loss from 100 to 400 MHz. SWR is 1.5 (max) and rejection is 30 dB (min) at 10 MHz. The filter is mountable using #0-80 UNC-tapped holes on the bottom surface. Size: 1.00" x 0.38" x 0.38", excluding SMA connectors at both ends.
Filtel Microwave Inc.,
Vaudreuil-Dorion, Quebec, Canada
Digitally Controlled, Miniature PIN Diode Attenuator
The model 1761 miniaturized, digitally controlled PIN diode attenuator covers the 2 to 18 GHz instantaneous frequency range. The unit measures 1.34" square x 0.50" and provides a monotonic attenuation range of 60 dB with 7 bit solution and 1 ms switching speed. The attenuator is an integrated assembly of a dual PIN diode attenuator and a driver circuit, comprising a digital/analog (D/A) converter and voltage-to-current converter. In addition, the unit is fully temperature compensated, weighs approximately 1 oz and is configured with SMA female RF connectors and a multipin connector for logic and power. The RF circuit comprises two wideband, T-pad attenuator sections in tandem. The levels of series and shunt currents required to maintain bilateral match at all frequencies are provided by the driver, assuring monotonicity over the full operating band at all levels of attenuation and for any programmed attenuation step. The attenuator is powered by +/-12 to 15 V DC and the logic input is TTL compatible.
General Microwave Corp.,
(516) 226-8900, ext. 291.
Miniature T/R Switch
The model HMC195 transmit/receive (T/R) switch supplied in a six-lead SOT-26 package is designed for use in switching applications that require high linearity and low insertion loss. The switch controls signals from DC to 3 GHz and is especially suited for 900 MHz, 1.8 to 2.2 GHz and 2.4 GHz industrial, scientific and medical (ISM) T/R applications. The small SOT-26 footprint is suitable for Personal Computer Memory Card International Association (PCMCIA) wireless card and cellular handset applications. The 0.5 dB insertion loss and 25 dB isolation are ideal for filter and receiver switching. By selecting the proper control bias, a 1 dB compression point (P1dB) of +36 dBm and input third-order intercept point (IP3) of +62 dBm are achievable. Dual control inputs, compatible with CMOS and most TTL logic families, require voltages of 0/+3 to +8 V while consuming little DC current. A higher linearity version offered in an MSOP eight-lead package also is available.
Hittite Microwave Corp.,
36 GHz Surface-mount Chip Resistor
The model RCC-0402PWXXXXJ surface-mount chip resistor is designed with partial-wrap platinum silver solder-coated terminations for solder attachment. The unit operates at 36 GHz with an SWR of 1.4. Resistance values from 10 to 2000 W at five percent tolerance are available from stock to four weeks, depending on value and quantity. Size: 0.040" x 0.020".
International Manufacturing Services Inc. (IMS),
High Speed Digital Attenuator
The model MIC-A92S digital attenuator offers high speed switching at 30 or 60 MHz. A high speed of 50 ns at IFs makes the unit suitable for use in radar applications. Phase variation is +/-0.7° over most of the attenuation range, which is 0 to 96 dB in 0.375 dB steps. Insertion loss is 9 dB (max) and accuracy is +/-0.15 dB or one percent of value (whichever is greater). RF nondestruct power is +20 dBm (min), SWR is 1.4 (max) and impedance is 50 W (nom). The attenuator is TTL compatible and monotonic. Size: 2" x 2" x 8" plus SMA connectors and an ISPIN logic connector.
(973) 887-8100, ext. 500.
38 GHz Waveguide Filter
The model 8WG-38910/R620-WR28 waveguide filter features a center frequency of 38910 MHz and insertion loss at center frequency of 1.75 dB (max). The filter has a passband of 620 MHz, SWR of 1.3 and rejection at fo +/-750 MHz of greater than 50 dB.
(800) 780-2169 or (410) 860-5100.
The model 76A00 coaxial relay incorporates a built-in RF or video amplifier, which is convenient when assembling nonblocking matrices or when a gain block is needed in conjunction with a coaxial relay. The module is self terminating, allowing it to mate with power splitters (which always need to be terminated). The unit can be used independently or incorporated in the company’s 11600 controller chassis, which provides RS-232, RS-422, IEEE-488 and keypad control. The relay’s DC to 800 MHz frequency response makes it ideal for switching wideband RF/IF or fast-rise video/pulse signals.
Compact Waveguide Components
The WGCER series components include high dielectric constant, high Q temperature-stable, ceramic block compact waveguide filters (bandpass, bandstop and lowpass) and diplexers (propagating and evanescent mode), hybrids and power dividers. All components are surface mountable. The usable frequency range is from 400 MHz to 5 GHz.
Polar Waves Consulting,
Canada (306) 934-6688.
The UFJ series cables are part of the company’s expanded line of UTiFLEX™ cables, which incorporate DuPont’s ARACON" metal-clad fiber as the shielding braid. ARACON reduces cable weight up to 35 percent with no loss of performance while offering five-times the strength of steel. The cables feature electrical properties similar to those of the company’s other UTiFLEX assemblies along with the unique properties of the ARACON cable. The cables are available in sizes ranging from 0.088" to 0.311" and support most common microwave connectors, such as TNC, 3.5 mm, SMA, GPO and type N. Cables are available with insertion loss as low as 0.20 dB/ft at 18 GHz.
High Power Splitters
The Dx-3 series high power splitters combine dual cellular/PCS bandwidth, low loss and 500 W power capability at an economic price. The units are designed with a lollipop planar layout and an 800 to 2000 MHz bandwidth. The output connector layout makes the units easier to install on a pole or against a wall. The reactive power splitters are ruggedly constructed, have fewer solder joints than conventional power dividers for enhanced reliability and reflect less power back to the transmitter. Models are available that split signals in two, three and four ways using either 7-16 mm DIN or N connectors.
(973) 992-7700, ext. 19.
The BUC series block upconverters are designed to convert a block of L-band input frequencies to C- or Ku-band, allowing the use of coaxial or fiber-optic IFLs. The converters deliver the performance required for INTELSAT, EUTELSAT, PanAmSat and other demanding satellite communications (SATCOM) applications. The block upconverters operate on a stand-alone basis or can be fully integrated into solid-state power amplifiers.
State College, PA
TV Channel Transmitter Output Bandpass Filter
The model 12209E enhanced bandpass filter removes spurious out-of-band emissions while maintaining low loss to maximize station coverage. The unit is available as a standard model for all UHF channels 14 to 69 (470 to 806 MHz) and in any channel format such as NTSC, PAL or SECAM. Custom units are available for special bandwidths or tuning requirements. The filter handles 1000 W of power with an insertion loss of 0.75 dB (max) and SWR of 1.2 (max). Rejection is 20 dB (min) with enhancement notches tuned at +/-4 MHz from the center frequency. Impedance is 50 W and connectors are 7/8" EIA. Size: 14.0" x 11.5" x 14.0".
Microwave Filter Co. Inc.,
East Syracuse, NY
(800) 448-1666 or (315) 438-4747.
Bias Tee and DC Blocking Capacitor
The model 5547 broadband, small coaxial bias insertion tee and DC blocking capacitor is designed to have a low cutoff frequency of 5 kHz. It passes fast rise pulses with a minimum of waveform distortion. Additional features include a rise time of 23 ps, flat frequency response, as well as a –3 dB bandwidth that extends from 5 kHz to greater than 15 GHz. Delivery: stock to four weeks. Price: $393.
Picosecond Pulse Labs,
High Intermodulation Performance Isolators
These high intermodulation performance isolators feature a built-in 20 dB attenuator as the load for precise reflected power detection. The high intermodulation performing unit provides a good –85 to –90 dBc intermodulation level with two 25 W (each) carriers (10 MHz separated). A 869 to 894 MHz model with a 100 W reflected power rating also is available. Forward power is more than 200 W, insertion loss is less than 0.25 dB and isolation is better than 25 dB (typ).
San Jose, CA
2.4 GHz ISM Diplexer
The model SL-2436 ISM 2.4 GHz diplexer offers a passband of fc +/-10 MHz (min). The units are temperature compensated to have a maximum frequency shift of 5 ppm/°C from –40° to +70°C. Passband loss is 2.5 dB (max) and isolation between transmit and receive is 90 dB (min). Connectors are SMA female. Size: 1.35" x 3.50" x 5.40".
Coaxial 2P2T Relays
The RWS series 2P2T coaxial relays provide a low cost option in the DC to 4, 18 and 26.5 GHz frequency bands. The five-port, 50 W, SMA connectorized devices are available as failsafe, pulse latching or latching with self cutoff and are offered with or without 50 W, 2 W internally terminated ports. Standard operating voltages include either 12 or 28 V DC. The relays are designed for high volume, high performance commercial and industrial applications that require less than 1.2 SWR, less than 0.2 dB insertion loss and up to 80 dB isolation to 4 GHz with derated performance to 26.5 GHz. Delivery: stock to six weeks (ARO).
RelComm Technologies Inc.,
Quadrature IF Mixers
The MR208 series quadrature IF mixers operate over the 2 to 18 GHz frequency range in five different bands. Typical conversion loss is 10 dB and quadrature phase balance is +/-5°. The mixers offer a typical amplitude balance of 0.3 dB and a DC offset of 4 mV (typ). All mixers operate with an LO drive level from 12 to 14 dB. LO-to-RF isolation is 30 dB and LO-to-IF isolation is 20 dB. The mixers are available in a 1.5" square housing with field-replaceable SMA connectors. Hermetically sealed devices are available upon customer request. Typical applications include phase detection in Doppler radar systems and quadrature phase-shift keying (QPSK) demodulators. Delivery: stock to four weeks.
Sage Active Microwave,
6 mm Ceramic Trimmer Capacitors
The GKG_ _ _15 and bottom-tuning GKG_ _ _16 series 6 mm ceramic trimmer capacitors are available in nine capacitance ranges from 1 to 3 pF to 15 to 70 pF. The molded plastic housings are color coded to identify the capacitance range of each model. The leads of both top and bottom adjust models are suitable for printed circuit production methods using either spring or straight leads. All models operate from –25° to +85°C and have a voltage rating of 100 V DC. Dielectric withstanding voltage is 220 V DC, insulation resistance is 10 MW (min) and tuning torque is 15 to 150 g-cm (0.21 to 2.10 oz-in). Price: 13¢ each (25,000) for the GKG_ _ _15 series. Delivery: stock to 12 weeks.
Sprague-Goodman Electronics Inc.,
Two-way Power Divider
The model DMM 2162 two-way power divider operates at 1.62 GHz +/-10 MHz with an insertion loss of 0.75 dB (max), isolation of 30 dB (min), SWR of 1.5 and power handling of 42 dBm (max). Connectors are SMA. Delivery: six to eight weeks. Price: $179 (1–9).
Technical Research and Manufacturing Inc. (TRM),
Low Profile RF Transformers
The FSDVL series RF transformers are designed in a low profile package for hand-held wireless equipment. The units’ surface-mount package measures 5.1 mm square x 2.5 mm. The self-resonant frequency extends up to 100 MHz and the inductance ranges from 1 to 500 mH. Designed originally as fixed inductors, the units have been reconfigured to operate as RF transformers in a noiseless feedback amplifier circuit. When used in this capacity, lower insertion loss and noise figure can be realized. Price: 70¢ (5000).
Toko America Inc.,
Mount Prospect, IL
RF Coaxial Cable Assemblies
These RF coaxial cable assemblies feature high shielded or standard RG cables and custom configurations in sizes from 0.110" to 1.200" OD. The units are produced in lengths up to 150 ft and can incorporate straight-thru and right-angle connectors, Teflon" and other insulations, and can be custom imprinted. The assemblies can include any combination of connectors including 7-16, N, LC/LT, SC, SQS, HN and SMA types. Connectors can incorporate brass bodies with silver- or gold-plated brass, phosphor bronze or BeCu center conductors and other materials, special insulations, gaskets and finishes.
Medium-power Coaxial Terminations
The models 1446 (25 W) and 1447 (50 W) medium-power coaxial terminations are optimized for wireless original equipment manufacturer (OEM) and test applications, and are designed to meet the environmental requirements of MIL-A-3933. The units offer a nominal impedance of 50 W, operate from DC to 5 GHz and feature an SWR of 1.2 (max). Operating temperature range is from –55° to 125°C. Custom designs are available.
(800) 638-2048 or (301) 831-4701.
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