- Buyers Guide
DC - 2.5 GHz Integrated SPDT Switch
The model AS169-73 integrated pseudomorphic high electron mobility transistor (pHEMT) SPDT switch delivers a broadband, low cost, integrated switching solution for transmit and receive chains operating from DC to 2.5 GHz. The AS169-73 features low insertion loss of 0.4 dB at 2.5 GHz and positive voltage operation with low DC power consumption. Manufactured in the miniature SOT-6 plastic package, this general-purpose switch can be used in a variety of telecommunications applications. Price: $2.70 each (100).
(800) 290-7200, ext. 306 or (508) 894-1904.
100 dB High Isolation Switch
The model SWM-6000-1DTU-ECL-GB ultra-high speed, 20 ns balanced, low video transient, nonreflective, SPST solid-state switch offers 100 dB isolation. Insertion loss is 3 dB and SWR is 2 (max) between 10 MHz and 2 GHz. The switch operates from +/-5 V DC at +/-100 mA (max) with emitter-coupled logic, but TTL is also available. The unit measures 1.5" x 1.5" x 0.4" with removable SMA connectors. Miniature sizes are also available.
American Microwave Corp.,
Multiport RF Connector System
This flexible multiport RF connector system houses an array of microminiature blindmate RF contacts, each providing a robust RF interface up to 18 GHz, within a chamfered lightweight aluminum shell. The system is designed specifically for applications requiring reliable, high density RF signals where small size and weight characteristics are important, and will accommodate the increased bandwidth required for next-generation broadband communications services, including video conferencing, digital data transfer, audio/video distribution and Internet traffic. A full complement of electromagnetic interference/RF interference shielding features are included to protect signal integrity, and locking jack screws ensure reliability with protection from shock and vibration.
The model AD9288 eight-bit analog-to-digital converter operates at 3 V and contains onboard track-and-hold circuits and separate encode clocks, allowing maximum design flexibility. Its low power requirement (110 mW with an input frequency of 10.3 MHz at 100 Msps per channel), single-supply operation and good dynamic performance make the AD9288 particularly well suited for dual-channel communications applications. The unit’s two channels can be operated separately, making it useful for battery-powered applications such as hand-held wireless equipment and low cost digital oscilloscopes. Prices (1000): $15.30 (100 Msps), $9.99 (80 Msps) and $5.40 (40 Msps). Delivery: stock.
Analog Devices Inc.,
(800) 262-5643 or (781) 937-1428.
Dual B-band Preselector Shelf
The model 5000440 rack-mount shelf with two eight-pole cellular wireline receive filters protects B-band (wireline) base receivers from interference from most A-band (nonwireline) mobiles and portables. The unit’s dual filters offer diversity receiver protection in a single 5.25" package, and combline bandpass filters feature steep skirts below 835 MHz and above 849 MHz. The dual B-band preselector shelf also protects against trunking base transmitter interference and provides extra filtering in the nonwireline receive band (824 to 835 MHz) and trunking transmit band (851 to 866 MHz).
Celwave, a division of Radio Frequency Systems Inc.,
Magnetic Coaxial Fail-safe Switch
The 601 series low cost, miniature, magnetic coaxial fail-safe switches operate from DC to 18 GHz. Standard with SMA connectors, these 50 W impedance switches with actuating voltage of 12 or 28 V DC can handle up to 100 W CW. Insertion loss is 0.50 dB (max), SWR is 1.5 (max) and isolation is 60 dB (min) with a switching time of 20 ms. Intended for test equipment applications, including switch matrices, microwave radios and selection of alternating antennas that are connected to a transmitter or receiver, these switches offer up to five million operations without performance degradation and can be used to alter the path of an incoming signal to one of the two outputs or one of the two inputs for an output.
Dow-Key Microwave Corp.,
300 W UHF Drop-in Isolator
The model EU332 drop-in isolator is designed specifically to operate in the UHF telecommunication frequency bands and isolate the linear-amplifier output stage from its load. Operating over the 0.8 to 1.0 GHz frequency band, the isolator provides typical insertion loss of 0.08 to 0.10 dB between 836 and 881 MHz, isolation of 23 dB (min) and output power of 300 W. Operating temperature range is 0° to +85°C and SWR is 1.17 (max). The integral termination can absorb 100 W of reverse power continuously. Size: 1.25" x 1.69" x 0.310".
Channel Microwave Corp.,
DC - 18.2 GHz TNC Connectors
These high power, hermetically sealed TNC connectors cover the DC to 18.2 GHz band with a maximum SWR of 1.1 and can handle 1 kW CW. Designed for use in the company’s hybrid couplers and filters as well as other microwave components, these connectors feature very low loss and superior mechanical rigidity as compared to the conventional connector design, protecting the component’s internal circuit. This in turn allows for use in extremely harsh environments. These connectors are available in screw-in type (spark plug) or flange-mounted style, and the design can be adapted to a type-N and -SC.
Microwave Engineering Corp. (MEC),
North Andover, MA
Filters and Diplexers
These millimeter filters and diplexers in a suspended substrate operate from DC to 40 GHz over the passbands of DC to 18, 18 to 26 and 26 to 40 GHz. Crossovers are 18, 23, 26 and 30 GHz, and rejection/isolation is 50 dB (min) at crossovers of +/-15 percent. Connectors are K female/male. The filters and diplexers offer insertion loss of 2 dB (max), SWR of 2 and crossover tolerance of +/-0.25 percent.
ES Microwave LLC,
Tunable Bandpass and Bandreject Filters
The BT and TNF series tunable filters are designed for cellular, PCS, PCN and WLL applications and include octave range tuning that replaces the need for several fixed tuned filters. The BT bandpass series filters operate from 500 to 3000 MHz and feature impedance of 50 W, nominal 3 dB bandwidth of five percent, SWR of 1.5 and power handling up to 5 W. The TNF bandreject series filters operate from 100 to 2000 MHz and offer passband insertion loss of < 0.5 dB (max) passband, SWR of 1.5 and impedance of 50 W. Delivery: stock.
K&L Microwave Inc.,
5.8 - 18.4 GHz Waveguide
The model WRD 584 waveguide is offered in a new size that allows transmission of C, X and Ku SAT-COM bands as well as the extended DBS band and covers the 5.8 to 18.4 GHz frequency band. WRD 584 directional couplers, terminations, adapters and related components also are available.
Microwave Development Co. Inc.,
The model 12740 triaxial-to-coaxial converter and/or coaxial-to-triaxial converter and distrib-ution modules feature nine converters in one module, adjustable gain and DC offset, and unity plus gain. Input/output impedance is 50 or 75 W over the DC to 200 MHz bandwidth. Typical applications include converter modules and distribution amplifier modules. Special configurations are available.
High Ratio Isolators
This complete line of low cost, high performance high ratio isolators features isolation up to 60 dB, SWR of 1.15, insertion loss of < 0.5 dB through the double pass and a 30 dB +/-1 dB flat attenuator port for reverse power monitoring. Designed for cellular, PCS and DCS applications, these isolators can handle up to 300 W CW power in the forward direction and 200 W CW in the reverse direction. Delivery: less than 30 days.
Mica Microwave Corp.,
San Jose, CA
The model ITT501AJ SPDT high power transmit/receive (T/R) switch operates from +3 to +10 V and features positive control with a 1 dB compression point of 35 dBm at +5 V. Packaged in an MSOP-8 plastic package, the switch is compatible with standard T/R switches. The ITTS159AB –5 V, high isolation, SPST reflective switch operates over the 0 to 5 GHz frequency range. Provided in an SO-8 package, the switches exhibit 49 dB of isolation at 1.0 GHz. These switches, along with six others introduced by the company, are designed for use in wireless handsets, local area networks, data, base stations and other wireless applications.
GaAsTEK, a unit of ITT Industries,
(888) 563-3949 or (540) 563-3949.
The MMFM-FBGW series bandpass filters feature center frequencies from 500 MHz to 40 GHz, a nominal 10.1 MHz 1 dB operating bandwidth, typical insertion loss of 3.9 dB and nominal input/output impedance of 50 W. These narrowband filters offer unique properties that make them well suited for applications in which extremely narrow bandwidths, small size, low insertion loss, moderate power levels and easy integration with other components are critical. The filters are manufactured using the company’s Multi-Mix™ multilayer manufacturing process that typically results in a filter that is significantly smaller, lighter and less expensive than conventional counterparts. Operating temperature range is –55° to +125°C. Size: 0.80" x 0.24" x 0.24".
Merrimac Industries Inc.,
West Caldwell, NJ
RF Preselector Bandpass Filter
The model 3278RF(3) bandpass filter is a cavity type, fully tunable filter used in UHF applications. The filter offers three high Q cavities, providing less than 2 dB insertion loss over a 6 MHz operating bandwidth and > 15 dB rejection at +/-8 MHz from center frequency, > 25 dB rejection at +/-13 MHz from center frequency and > 40 dB rejection at +/-22 MHz from center frequency. Return loss is 14 dB (min) in the passband, and the filter can be retuned to any 6 MHz channel in the 470 to 890 MHz frequency range. The unit is available in two- or four- cavity configurations to provide more or less selectivity as required, and 50 or 75 W configurations as specified.
Microwave Filter Co. Inc. (MFC),
East Syracuse, NY
(800) 448-1666 or (315) 438-4747.
800 - 1000 MHz Frequency Mixer
The model ADM-10DH frequency mixer is a low noise, high performance solution for airphone and cellular applications, and has a typical conversion loss of 6.0 dB and 30 dBm IP3 (typ at midband). Operating over the 800 to 1000 MHz frequency band, these level 17 surface-mount mixers typically provide L-R and L-I isolation of 35 and 37 dB, respectively, and have a maximum 200 mW RF power rating. Operating temperature range is –20° to +85°C. Price: $15.95 (1–9 units).
Lightning and EMP Protection Products
These coaxial lightning protection products for use in base stations are integrated into an antenna feed line and designed specifically to protect expensive equipment from lightning and electromagnetic pulse (EMP)-induced energy. A variety of interfaces are available, including type-N and 7/16 DIN connectors. All parts are designed to handle the high induced current associated with lightning and EMP as well as deliver superior IM performance.
Radiation-resistant RF Coaxial Connectors
These 50 W radiation-resistant RF coaxial connectors are designed with special insulators and constructed for use in nuclear environments. The devices have brass or beryllium-copper bodies with silver or nickel plating (or stainless steel) and aluminum construction. Featuring insulators machined from Rexolite® or other radiation-resistant materials and beryllium-copper center contacts, the connectors are capable of withstanding neutron and gamma irradiation. Available with N, HN, LC, BNC and twin interfaces per MIL-STD-348, the connectors can be supplied as straight plugs, jacks, and tee- or angle adapters, and are ideally suited for use with RG-8A, 9B, 213 and 214/U cable types.
(800) 262-9878 or (978) 532-0775.
The model 0470IED drop-in isolator provides 20 dB isolation and has low insertion loss of 0.4 dB over the frequency bandwidth of 4.4 to 5.0 GHz with an SWR of 1.25. The circuit tabs are designed to provide excellent yield during circuit assembly. Operating temperature range is –20° to +85°C. (Storage temperature range is –50° to +125°C.) The package size is: 0.5" x 0.5" x 0.25". Delivery: stock. (Isolators and circulators in other frequency bands are available in a similar package.)
Morgan Hill, CA
75 W Broadband RF Directional Couplers
These 75 W surface-mount broadband RF directional couplers have an operating bandwidth of 5 to 900 MHz, are rugged enough to withstand IR reflow manufacturing techniques and operate in an environment within a temperature range of –40° to +85°C. Designed specifically for use in high volume cable applications such as set-top boxes, line amplifiers and headend equipment, these directional couplers separate an input signal into two unequal output signals, and the stronger signal appears at the main output port with little degradation. The highly isolated smaller signal allows network designers to sample the main line signal without affecting it. Price: $1.36 (25,000). Delivery: six weeks.
Pulse, a Technitrol company,
San Diego, CA
Surface-mount Hybrids and Couplers
These high power, surface-mount quadrature hybrids and surface-mount 3 dB couplers cover the 1.5 to 2.4 GHz and the 20 MHz to 20 GHz bands, respectively. Both series have superior match and repeatability, and cross reference to any size and frequency up to over 20 GHz. While most of the company’s products are an octave wide, some can be optimized for 1° phase match and 0.1 dB amplitude match in narrower-band cases, such as cellular and PCS.
San Jose, CA
PIN Diode Switches
These SPST, SP2T, SP3T and SP4T ultraminiature switches operate over the frequency range of 2 to 18 GHz with a 100 ns switching speed. The switches are designed to operate over the –55° to +100°C temperature range and have removable connectors for drop-in applications. Customized variants of these standard switches are also available. Delivery: two weeks.
Robinson Laboratories Inc.,
Wideband, Load-insensitive Mixers
The models SM5T, SM5T17 and SM5TH wideband, load-insensitive mixers are available in hermetic, surface-mount packages for high reliability applications. Frequency coverage is 50 to 5000 MHz, LO and RF (50 to 3000 MHz, IF), with availability in +10, +17 and +23 dBm LO drive levels. Typical performance includes 7.2 dB conversion loss and 35 dB isolation.
Stellex Electronics Inc.,
Palo Alto, CA
Miniature, Tight-tolerance Chip Inductors
The PTL1005-F series photo-etched chip inductors offer reliability and superior performance to a variety of mobile communication designs and have a 0402 footprint (1.0 mm x 0.5 mm) with a low profile of 0.5 mm. Designed for use in GaAs FET matching circuits such as low noise amplifiers and voltage-controlled oscillators, these highly stable chip inductors have a +/-0.2 nH or two percent inductance tolerance over the full temperature range and a 100 ppm/°C temperature coefficient. Self-resonant frequency is controlled within +/-10 percent and inductance is specified at 800 MHz as well as 100 MHz. The PTL1005 devices are available in 1.0 to 12.0 nH inductance values and are packaged on tape and reel in 10,000-piece quantities.
Toko America Inc.,
Mount Prospect, IL
Integrated VCO and Mixer Assembly
The model VDM/1900-260L combined VCO, mixer, filter and amplifier is integrated and positioned on one circuit board. Primarily designed for wireless applications in PCS base stations, the combination eliminates tuning mismatch errors and reduces tuning and testing time. The integration of these components provides conservation of board space with dimensions of 1.20" x 1.20"’ x 0.28" and conserves power with a typical current draw of 100 mA.
Trak Communications Inc., a Tech-Sym company,
The model SM2001 16 A power switch and SM7001 terminated microwave switch are designed for high density signal switching systems that require fast switching speeds. The SMIP family of switches provide more than 30 different switch configurations from DC to light, and can be controlled via a general-purpose interface bus, RS-232, Firewire, Ethernet or PCI. Delivery: stock to four weeks (ARO).
VXI Technology Inc. (VTI),
1000 W Coaxial Attenuators & Terminations
The model 82 coaxial attenuators and model 1456 terminations are capable of handling up to 1000 W average (unidirectional) and 10 kW peak power over the frequency range of DC to 3 GHz. The attenuators are available in 20, 30 and 40 dB versions. Others feature of the attenuators and terminations include a maximum SWR of 1.25 and operating temperature range of –55° to +125°C. Type-N or 7/16 connectors are available.
(800) 638-2048 or (301) 831-4701.