- Buyers Guide
Military Microwaves Supplement
The models 50V10 and 50V70 rotary step attenuators provide attenuation ranges of 0 to 10 dB and 0 to 70 dB over the cellular/personal communications service (PCS) frequencies of 800 to 2000 MHz. Each unit is supplied with index stops, knobs and provisions to panel mount the device. TNC, BNC, SMA and N connectors are available.
Alan Industries Inc.,
3 dB Hybrid Couplers
The models 1X503, 1X603 and 1X703 surface-mount, 3 dB, 90° hybrid couplers are designed for wireless applications. The units operate at 1.9, 2.4 and 3.5 GHz respectively, are capable of handling 40 W CW average power and have edge-plated channels for reliable soldering and inspection. Operating temperature is –55° to +85°C. Size: 0.560" x 0.200" x 0.075". Prices: start at 89¢ for large-quantity orders. The units are available in standard tape-and-reel packaging for automated assembly lines.
Anaren Microwave Inc.,
E. Syracuse, NY
Adapters and Connectors
These adapters have been manufactured to interface the ARINC #1 and #5 series connectors to the more standard type N, TNC, SMA or other series as needed. Most combinations of jack/plug configurations and body styles can be incorporated to meet specific testing or production requirements. Cable connectors with ARINC interfaces also can be fabricated for most popular flexible and semirigid cables.
Las Vegas, NV
(702) 739-8155 or (702) 739-8157.
These interdigitated capacitors (IDC) are designed for use in high speed microprocessors, digital signal processor chips, and application-specific IC (ASIC) chipsets and memory devices operating at frequencies greater than 300 MHz. The IDCs offer inductance values as low as 175 pH and are available in the 0612 chip size with capacitance values up to 2.2 mF at 10 V and 0.22 mF at 16 V with tolerances of +/-20 percent in X7R dielectric. Terminations are available in plated nickel and solder.
Myrtle Beach, SC
High Power Ferrite Circulator
The model WR 284 high power circulator is designed for microwave heating applications. The frequency is calibrated at 2450 MHz (+/-25 MHz). Power is 3 kW with heat-sink mounting. A water-cooled version rated at 6 kW also is available. The full band (2600 to 3950 MHz) can be covered in 300 MHz (typ) bandwidths. Matching water loads are available for the rejection ports.
Connecticut Microwave Corp.,
40 GHz Cable Assemblies
These cable assemblies operate mode free to 40 GHz and are available with Handi-Form II™ series hand-formable coax in standard and custom lengths or in 0.085" diameter semirigid cable custom configurations. Both types feature the company’s 2.92 mm 200 series K™ connectors with special dielectric beads that are impervious to cleaning solvents. Specifications include an SWR of 1.35 (max) from DC to 40 GHz (male connectors, no bends) and insertion loss of 2 dB at 40 GHz (12" male connectors, no bends). The interface meets MIL-STD-348 and the cable is in accordance with MIL-C-17. The assemblies can tolerate the solvents, dirt and oil often present in production and test environments.
Connecting Devices Inc. (CDI),
Long Beach, CA (562) 498-0901.
Circle No. 220
Broad Bandwidth, High Power Protection Limiter
The model DSL2080-R4 high power protection limiter is designed with a multiple-diode hybrid assembly to provide 100 W CW and 1 kW peak pulse power protection for microwave systems. The unit features a low 2.5 dB insertion loss and SWR of 2.1 over the frequency bandwidth of 2 to 8 GHz. The unit can be integrated into microwave assemblies with two contacts because it requires no external bias. This hermetically sealed module can be provided with or without connectors and can be screened per MIL-STD-883 requirements.
Santa Clara, CA
L-band High Power Transfer Switch
The model 411H-185 L-band high power transfer switch features transfer, latching and indicator circuitry. The unit’s operating voltage is 28 V DC. The switch features an SWR of 1.20 (max) and an insertion loss of 0.15 dB (max). Isolation is 70 dB (min) and peak power is 290 W at 1.6 GHz (multipaction-free operation).
Dow-Key Microwave Corp.,
PIN Diode I and Q Vector Modulator
The model M2L-68N-5 360°/20 dB PIN diode in-phase (I) and quadrature (Q) vector modulator operates from 6 to 18 GHz. Across the entire band, total phase error is less than +/-10° and amplitude error is less than +/-1.5 dB. SWR is better than 2 and insertion loss is better than 12 dB. The device demonstrates a linear control input slope with output voltage. With a monotonic performance, the device is digitally controlled via two sets (I and Q) of 12-bit TTL-compatible binary logic inputs. Switching speed is less than 500 ns.
G.T. Microwave Inc.,
Surface-mount Power Inductors
The PM125SH and PM127SH series surface-mount power inductors are designed for high current, compact switching power supplies and DC-DC converters. Available inductance ranges are from 10 mH to 1 mH with 4 to 0.4 A DC and 1.2 to 47 mH with 9.8 to 2.5 A DC for the PM125SH and PM127SH series, respectively. Both series feature a 12 x 12 mm footprint with a height of 6 and 8 mm, respectively. The models are tape-and-reel packaged (500 per reel) for convenient automated soldering. Delivery: immediate. Price: $1.17 to $1.46 each (1000).
J.W. Miller Magnetics,
The model 50P-1242 solid-state attenuator offers an attenuation range of 127 dB in 1 dB steps over a frequency range of 15 to 2000 MHz. Designed to meet the needs of cellular and PCS RF simulation applications, this model features an attenuation accuracy of +/-0.3 dB or two percent of the programmed value. The solid-state design provides high reliability, long switch life and a switching speed of 10 ms. Programming (seven lines) is TTL or 5 V CMOS via a T&B control connector. RF connectors are SMA female. Size: 4.22" x 1.84" x 0.70". Delivery: four to six weeks.
Diplexed Cavity Filter
The model 16FZSP-5745/5810-O/O cavity-type diplexer with SMA connectors features center frequencies of 5745 and 5810 MHz with approximate 3 dB bandwidths of 44 MHz. The unit has a low insertion loss of 2 dB at respective center frequencies. Co-channel isolation is 55 dB and SWR is better than 1.5 in 90 percent of the pass bands. Size: 4.25" x 3.25" x 1.00".
K&L Microwave Inc.,
3 mm SMA Connector System
This 3 mm SMA connector system operates from DC to 18 GHz and uses interchangeable transition pins and tabs. The system offers fast, simple field repair; convenient testing; rapid signal-level trimming; relief from thermal and external mechanical stress for added reliability; increased system design options; and reduced inventory requirements. A variety of SMA connectors are available with bodies with standard two- or four-hole flange-mount jack and plug configurations. Connector bodies are passivated stainless steel with beryllium copper, gold-plated (SMA jack) center contacts and Teflon™ dielectric. SWR is 1.05 + 0.005 f (GHz) and nominal impedance is 50 W. Pins are offered in several configurations, including slotted and half-slotted, wedge, tab, jack, machinable blank jack or plug, tab or pin contact, and test pin. Price: $3 for a typical 3 mm/SMA straight-thru threaded hermetic connector with interchangeable transition pin (depending on connector/interchangeable transition pin system).
Micro Lambda Distributors Inc.,
The model B11607M1 bandpass filter features a center frequency of 607 MHz, +/-0.5 dB bandwidth of 64 MHz (min) and rejection of greater than 60 dBc at 467 and 747 MHz. Connectors are SMA female. Size: 0.50" x 0.50" x 1.75" excluding connectors.
Microwave Circuits Inc.,
The SMC series fixed attenuators are available in either 50 or 75 W versions. The 50 W models offer a frequency range to 2 GHz while the 75 W models are rated to 1 GHz. Both versions offer attenuation values of 1 to 30 dB. A similar attenuator product also is available with SMB connectors.
Microwave Devices Inc.,
Active Multiplier Chains
The AMC series active multiplier chains extend the frequency of sources in the 8.25 to 20 GHz range to Ka-, Q-, U-, V- and W-bands. Using the units, the mm-wave spectrum from 26.5 to 100 GHz can be covered continuously. The W-band active multiplier covers 100 to 110 GHz with an output power of approximately –6 dBm. Frequency stability at the output frequency is the same as it is in the input source. The output phase noise will degrade typically by the (20 Log N) formula, where N is the multiplication factor of the active multiplier chain.
South Deerfield, MA
Thin-film Surface-mount Components
These passive thin-film surface-mount resistors, capacitors and networks are designed for a wide range of configurations and values. The units feature a two- to 16-lead configuration, network lead pitch of 25 mil, resistance range of 1 W to 100 MW, capacitance range of 2 to 1200 pF, absolute tolerance to 0.05 percent, current noise of less than –30 dB (typ), a standard operating voltage of 100 V (max) and a power rating of 50 mW per resistor (70°C derated linearly to 150°C).
Mini-Systems Inc., Thin Film Division,
Multi-octave Band Reject YIG Filter
The model M1742R multi-octave band reject yttrium iron garnet (YIG) filter comprises eight stages covering the frequency range from 4 to 18 GHz. The wide 40 dB rejection bandwidth is 15 and 60 MHz at 4 and 12 GHz, respectively. Out-of-band insertion loss is 1.5 dB (typ) with tuning sensitivity of 24 MHz/mA (typ). The unit operates from –54° to +85°C. Size: 1.7" cube.
Santa Clara, CA
The model RSA-3000-X right-angle SMA male crimp plug and the model RSA-3010-X straight SMA male crimp plug feature Teflon insulation, gold contacts and nickel-plated bodies. The connectors are designed for simple assembly and installation and can be used with RG-8-X, RG-30/U, Belden 9258, Maxrad M8x-100, Micro 8/U, Remee 1600, Saxton 8315 and Times Microwave LMR-240 Ultraflex cables.
RF Connectors, a division of RF Industries,
San Diego, CA
Ceramic Resonators, Inductors and Elements
These low cost, high volume resonators, inductors and custom elements are designed for use in VCOs, filters, high Q inductors and unique frequency applications. The resonators operate from 200 to 8500 MHz and are available in a variety of sizes from less than 2 mm to more than 12 mm for larger base station applications. Various metallizations are tailored to individual customer requirements. Dielectric resonator pucks also are available upon request.
PicoFarad/Val Jackson & Associates Inc.,
Scotts Valley, CA
50 W Coaxial Terminations
These 50 W coaxial terminations are designed for use in absorptive filters, RF amplifiers, dummy loads for circulators and general lab test use. Several case style models are available with 15 to 500 W power handling and frequency ranges from DC to 3 GHz. An 800 W model features a frequency range of DC to 500 MHz. The terminations require hard mounting to a heatsink and are available with standard SMA and N connectors unless otherwise requested. All models feature small size, low SWR and a choice of form factors. Delivery: stock to four weeks.
RF Power Components Inc., Resistive Components Division,
(516) 563-5050, ext. 230.
Drop-in Stripline Circulators
These drop-in stripline circulators feature intermodulation optimization of –90 to +95 dBc (typ) with two tones (each at 44 dBm). The optional tab on the load is designed for connection to an external detector for high reflected power detect (and corresponding amplifier defeat). Similar products in PCS bands are available.
San Jose, CA
High Rel Solderable Feedthrus
These precision RF, DC and capacitive feedthrus are designed for use in the microwave field. The feedthrus provide good reliability in rugged thermal environments, as well as significant cost savings through the elimination of costly rework and unnecessary testing requirements.
Special Hermetic Products Inc.,
DC - 50 GHz Cables
These cables are designed for wireless applications from DC to 50 GHz. The flexible cables are available from 0.055" diameter and the semirigid cables are available from 0.035" diameter. The type 421-042 (0.070" diameter) cable features an insertion loss of 0.6 dB/ft. at 2 GHz and 1.1 dB/ft. at 6 GHz. Custom cable assemblies combine many sizes and types of coax and twisted-pair cables.
Storm Products Co., Advanced Technology Group,
(888) 347-8676 or (630) 323-9121.
Two-way Power Combiner
The model CMM 2196C-1/N two-way power combiner operates over the frequency range from 1710 to 2200 MHz. Insertion loss is 0.30 dB (max), isolation is 20 dB (min) and SWR is 1.2 (max). Additional specifications include a phase balance of +/-3° and input power of 80 W (max). Delivery: stock to six weeks.
Technical Research and Manufacturing Inc. (TRM),
PCB Ceramic Bandpass Filters
These filters are produced on a standard PCB platform and provide a flexible and versatile solution to meet a designers requirements. The units are offered in multiple profiles over a frequency range from 800 to 3000 MHz and meet a number of electrical and mechanical requirements. Pretooled components offer rapid response times for prototypes and production volumes.
Trans-Tech, a subsidiary of Alpha Industries,
Metallized Polypropylene Film Capacitor
The MPX series metallized polypropylene film capacitor provides class X2 interference suppression and meets several international approvals, including UL, CSA and VDE. The unit is designed for use in line-by-pass, antenna coupling, across-the-line and spark killer circuits and is best suited for use in electromagnetic interference (EMI) filter and switching power supply applications. The capacitor features a metallized polypropylene film dielectric and copper-clad steel leads. The operating temperature range is from –40° to +85°C and the capacitance range is from 0.0047 to 1.0 mF. The unit features a standard capacitance tolerance of J = +/-5 percent, K = +/-10 percent, M = +/-20 percent with a rated voltage of 275 V AC (250 V AC for UL and CSA) from 50 to 60 Hz. Dielectric strengths are 1075 V DC for one minute or 2000 V DC for one second. Sizes range from 13 x 11 mm to 37 x 24 mm. Delivery: stock to eight weeks. Price: starts at 15¢ each (1000).
Tecate Industries Inc.,
SMT Miniature Ceramic Chip Inductors
The V0603/V0805/V1008 series SMT miniature ceramic chip inductors are wirewound on a ceramic body and are designed for communications and broadcast applications. The high stability chips are built to close inductance tolerances, featuring high Q values and low DC resistance. The inductors are available in 0603, 0805 and 1008 footprints. Available tolerances include 20, 10, five and two percent. Solder or gold terminations are available. Prices: 11¢ to $1.05 each for 20 percent tolerance chips, depending on quantities and values.
Vanguard Electronics Company Inc.,
GaAs IC Transfer Switch
The model AS127-59 DC to 2 GHz four-port switch is designed to combine transmit/receive and an antenna changeover switching capability in one device. By eliminating the duplexer, the switch reduces the size, weight and cost without sacrificing performance. The switch features high linearity, thereby reducing rejection requirements of filters, and delivers low insertion loss, translating into longer talk time and less power requirements. The switch has control voltages of 0/5 V and is suitable for applications requiring low power consumption. In addition, the unit’s 2 GHz performance makes it suitable for dual-band applications.
(508) 628-4702, ext. 311.
Miniature EMI Filters
The 4300 and 4400 series miniature EMI filters are available in solder-mount or threaded bushing styles and offer capacitance values from 5 to 50,000 pF. Working voltage WV DC at 125°C ranges from 50 to 200 V. The filters are available in C and L circuits and offer a variety of electrical performance characteristics, as well as various lead options. Insertion loss is 70 dB at 1 GHz. Solder-mount styles feature a 0.128" diameter and threaded styles are 4-40 or M3 metric thread sizes.
Broadband, Miniature SP8T Switch
The model MSN-8DR/DT-05 miniature single-pole, eight throw (SP8T) switch covers the frequency band of 0.5 to 18 GHz and is available in either reflective or absorptive versions. Insertion loss is –3.5 dB (max), SWR is 2 (max), and isolation is 60 dB (min) at 2 GHz and 70 dB (min) at 18 GHz (80 to 90 dB (typ)). Switching speed is 75 ns (typ) (100 ns (max)) for both delay on and off. (A higher speed of 20 ns is available.) Power supplies are +/-5 V with a positive current draw of 400 mA (max) and a negative current draw of 75 mA (max). Control is TTL compatible (independent or decoder options). The small package measures 4.0" x 1.5" x 0.4". Additional versions are available from SP2T to SP32T.
American Microwave Corp.,
Nonmagnetic Trimmer Capacitors
The company’s line of nonmagnetic trimmer capacitors has been expanded to include miniature versions with polytetrafluoroethylene dielectric along with hundreds of air, glass, quartz and sapphire trimmers. All versions are truly nonmagnetic and will not distort the magnetic field more than one part per 600 million. Maximum values range from 1 to 250 pF and each will exceed its rated DC and pulse voltage rating from 250 to 15,000 V. Extended shafts are available. Several versions can be used at cryogenic temperatures of 4 K in nuclear magnetic resonance or new low noise amplifiers (LNA). Special parts can be produced by changing standard parts or with completely new requested configurations.
RF Coax Connectors
The Quick-Change series connectors incorporate a consistent QC end and are available in 7-16, BNC, C, HN, LC, LC-large, LT, N, QDS, SC, SMA, TNC, UHF, LC-HV, LC-POL, SQS, and 7/8" and 1-5/8"-50 EIA types. The connectors feature a 1-1/4" square panel-mount base plate and an adapter block that combines all connector types and solves gender mating problems. Connector changes are made by removing four screws. The connectors are constructed from nickel-plated brass with a Teflon insulator and silver-plated beryllium-copper contacts.
(800) 262-9878 or (978) 532-0775.
High Frequency Inductors
The 304 series high frequency inductors are designed for use as filters in high frequency power supplies. The units handle significant amounts of DC and attenuate frequencies as high as 1 MHz. This low profile, surface-mount design has been optimized to maximize inductance and minimize losses under load. The units also feature stable inductance and low EMI. ASIC designs are available on request.
West Coast Magnetics,
2 - 1000 MHz Bias Tee
The model A82PIN/A bias tee satisfies requirements for supplying power to an AC- or DC-powered device through the coaxial cable. The injection of the AC/DC bias current causes negligible modulation or SWR change. SWR (AMP-RCVR) is 1.5 (max) from 2 to 1000 MHz and 1.1 (max) from 5 to 900 MHz. Isolation (RCVR-DC) is 60 dB (min) from 3 to 1000 MHz. Impedance is 50 W. Delivery: four to six weeks (ARO). Price: $108 with BNC connectors.
Wide Band Engineering Company Inc.,
The fleXBGA series ball-grid array (BGA) package offers a high input/output density solution, a die-up wirebonded configuration with a flex circuit substrate and an over-molded body. The construction, manufacturing method and material set are very similar to the industry-proven PBGA. The package has a thin outline and is extendible from a ball pitch of 1.0 to 0.8 mm. The package is designed for several applications, including disc drives, cellular telephones, pagers, PC laptops, compact computer equipment, and digital cameras and camcorders. In addition, the package features 63 Sn/37 Pb solder balls and a JEDEC MO-195 outline.
Santa Clara, CA
The models ADDC02803SC and ADDC02805SA converters power digital or low voltage analog ICs from a 28 V DC power source. The ADDC02803SC model provides a 3.3 V, 66 W output at 20 A and the ADDC02805SA model provides a 5 V, 100 W output at 20 A. To achieve their performance level, the converters employ a flyback topology with dual-interleaved power trains operating 180° out of phase. Each power train switches at 500 kHz, producing a 1 MHz fixed switching frequency as observed from the converter’s input and output. The flyback topology stores energy in an inductor during one-half of the switching cycle, then transfers it to the output filter during the other half. The control circuit maintains a nearly constant output current even as output voltage drops quickly from VO (nom) to V SC during a short circuit. Remote sensing, which can attach at the load, can adjust for voltage drops of as much as 0.25 V DC between the converter and the load, which maintains accurate voltage levels under a variety of power delivery scenarios. Size: 1.50" x 2.75" x 0.39". Price: $775 (100) (industrial-grade version); $1185 (100) (ruggedized industrial-grade versions; $1395 (100) (SMT version).
Flat Strip Cable Kits
The RADIAX" series flat strip cable kits include radiating coaxial cable, connectors and terminations for the rapid and easy installation or expansion of in-building wireless communications networks. The 1"-wide x 0.3"-thick peel-and-stick cable can be installed below false ceilings and in other visible areas, eliminating the need for plenum-rated cables. To speed installation, solderless, quick-fit connectors and terminations are included in the kit. The cable is installed by peeling off the adhesive backing and sticking the cable in the desired location. This in-building wireless communications solution cuts labor time and reduces RF signal blockage, leading to reductions in RF power requirements. The kits are prepackaged in 100-, 250- and 500-foot lengths. No special installation tools are required. The kits support frequencies from VHF cellular and PCS.
Orland Park, IL
(800) 255-1479, ext. 350.
The model NL1100 IrDA transceiver is designed to provide a wireless data link over distances of up to 1 m. The unit features high speed, low current draw and low operating temperatures. The transceiver confirms to the latest FIR/IrDA 1.1 standards for data rates of 2.4 kbps to 4 Mbps and is backwards compatible to the slower speed SIR/IrDA 1.0 standard (2.4 to 115 kbps) as well as the ASK protocol. The unit is compatible with all major ASIC, field-programmable gate array and super input/output controller devices. Its low typical light-emitting diode current draw of 300 mA is suitable for battery-operated products such as laptop computers, digital cameras and handheld data loggers. Price: $2.95 (100,000). Delivery: stock.
California Eastern Laboratories (CEL),
Santa Clara, CA
High Density SCSI Connector
The model MDP (CA-68MDP-F), 68-position, pin-and-socket-type connector is designed for SCSI applications and features a proprietary insulation displacement (IDT) design with a two-piece grooved cover and grooved retainer for fast, accurate and reliable termination. It also uses a unique contact contour, which improves dielectric between the IDT contact and the adjacent conductor. The design of the cover/retainer/base system within the connector provides complete cable guidance, restricting cable movement and ensuring precision location of the conductors before, during and after termination. The high density connector is also fully SCSI-3 compliant. Delivery: stock. Price: $1.25 in manufacturing quantities.
Circuit Assembly Corp. (CA),
Flexible Cable Assemblies
The ST142 series flexible cable assemblies offer lower attenuation at higher frequencies than the same-size MIL-C-17 units. Typical loss is 0.68 dB/ft. at 18 GHz. The cables’ shielding levels exceed those of flexible MIL-C-17 cables. The shielding offers lower transfer impedance than any double-braided mil-spec cable. All connector types are available.
Christensen Smith Tran (CST),
Sun Valley, NV
The model 12740 triaxial-to-coaxial/coaxial-to-triaxial converter and distribution modules feature unity plus gain, DC to 200 MHz bandwidth, DC offset adjustment and 50 to 75 W input/output impedance. The model features nine converters in one module, coaxial in, triaxial out, 50 W in, 75 W out, and adjustable gain and DC offset. The units can be used in converter and distribution amplifier modules.
Get access to premium content and e-newsletters by registering on the web site. You can also subscribe to Microwave Journal magazine.