GaAs MMIC SP4T Switches
These two new SMT packaged GaAs PHEMT MMIC SP4T switches are ideal for industrial sensors, test and measurement, microwave radio, military EW and space applications up to 30 GHz. The HMC641LP4E is a MMIC SP4T switch that is rated for operation from DC to 20 GHz. This wideband, non-reflective switch exhibits 2.3 dB insertion loss and 42 dB isolation at midband, and features an on-chip binary decoder that requires only two 0/-5 V control lines. The HMC944LC4 is a MMIC SP4T switch that is rated for operation from 23 to 30 GHz. This compact Ka-band switch exhibits 2.8 dB insertion loss and 35 dB isolation, and features fast switching speed of only 53 ns. The HMC944LC4 is controlled with 0/-3 V logic and consumes much less DC current than a PIN diode-based solution.
Hittite Microwave Corp.,
Chelmsford, MA
(978) 250-3343,
www.hittite.com
High Power Pulsed Transistor
Integra Technologies demonstrates the advantages of LDMOS technology in pulsed radar applications. The high power pulsed transistor part number ILD2731M200 is designed for S-band systems operating from 2.7 to 3.1 GHz. Operating at a pulse width of 300 µs with a duty factor of 10 percent, this device supplies a minimum of 200 W of peak pulse power across the instantaneous operating bandwidth of 2.7 to 3.1 GHz. The ILD2731M200 will be released and available for sampling in Q4 of 2010. The high power pulsed transistor part number ILD3135M180 is designed for S-band systems operating from 3.1 to 3.5 GHz. Released in Q3 of 2010, the ILD3135M180 is available for immediate sampling now.
Integra Technologies Inc.,
El Segundo, CA
(310) 606-0855,
www.integratech.com
Fixed 3 dB Attenuator
Narda introduced the model 4772-3 miniature fixed 3 dB attenuator that has flat frequency response, low VSWR and meets environmental requirements for MIL-A-3933. The attenuator measures only 1.24" × 0.38" and weighs 0.5 oz. It handles 2 W average and 200 W peak power, with a VSWR of 1.4:1 or less and attenuation deviation of ±0.3 dB or less. Connectors are stainless steel SMA female. The model 4772-3 attenuator is available for immediate delivery.
Narda,
Hauppauge, NY
(631) 231-1700,
www.nardamicrowave.com/east
E-scan Surveillance Radars
The Blighter B400 series is the company's latest generation of e-scan surveillance radars (GSR), which can scan and detect moving vehicles and people (including crawlers) over a wide area and provide good range performance out to 32 km. Blighter radars incorporate a combination of FMCW and Doppler processing technology ensuring ground clutter cancellation. They are all-in-one fully integrated units comprising antennas, signal processing, plot extractor, GPS and compass. They are designed to withstand harsh environmental conditions, and include a built-in precipitation filter that suppresses false detection from rain and snow. Day/night 24 hour operation is fully supported.
Plextek Ltd.,
Great Chesterford, UK
+44 (0)1790 533200,
www.blighter.com
Power Transistors
RFMD has production released the RF3932, a 75 W, highly efficient gallium nitride (GaN) RF unmatched power transistor (UPT) that delivers superior performance versus competing GaAs and silicon power technologies. The release of the RF3932 follows the recent release of the 140 W RF3934, which is the highest output power device in RFMD's UPT family. RFMD plans to release a third GaN UPT device in the first calendar quarter of 2011, significantly expanding the GaN power transistor options available to RFMD's customers.
RFMD,
Greensboro, NC
(336) 664-1233,
www.rfmd.com
Hybrid Ferrite Transmitter Combiners
Sinclair's new TCC series compact hybrid ferrite combiners offer economical combining solutions for systems requiring extremely close frequency separation and space-efficient racking. The combiner is assembled on a very small 1U high tray. Each unit allows 2 or 4, 60 W transmitters to be combined with one antenna. The UHF and 700/800/900 MHz band TCC series features broad bandwidth that can combine a wide range of transmitter frequencies. These frequencies can be changed without having to re-tune the combiners. The VHF band TCC series offers a bandwidth of 3 MHz, which can be customer adjusted within ±5 MHz of the factory tuned frequency.
Sinclair Technologies Inc.,
Aurora, Ontario, Canada
(800) 263-3275,
www.sinctech.com
Indirect/DDS Synthesizer
The model SYN151 offers an extremely low profile, thermally managed, quick removal line replaceable unit (LRU) that is ideal for harsh airborne environments. The selectable L-band (±100 MHz) output port provides sub-hertz step size and less than 200 µs switching speed. Phase noise performance is <-100 dBc/Hz at 1 MHz offset from carrier, with -80 dBc spurious (1 to 80 MHz offset) and output power of +11 dBm. This unit provides excellent performance over an operating temperature range of -54° to +76°C.
TRAK Microwave,
Tampa, FL
(813) 901-7200,
www.trak.com
Components
Low Cost Resistive Components
Anaren Inc. announced that it has launched a new line of low-cost resistive components designed specifically for commercial wireless bands such as GSM, 3G, 4G, LTE and popular narrow bands between DC to 6 GHz. The line of SMD, chip, flanged, and flangeless components also offers compact packaging (as small as 0.05" × 0.1"), RoHS-compliant materials, and electrical performance advantages like high-power handling (up to 250 W) and low return loss that are so important to next-gen base station equipment providers. With the new line, Anaren is moving from a resistive components offering that caters to all potential markets in order to focus on delivering design, performance, and cost advantages specific to the commercial wireless, high volume/low cost segment.
Anaren Inc.,
East Syracuse, NY
(315) 432-8909,
www.anaren.com
6 dB Directional Coupler
The AM1650DC838 directional coupler is designed for wireless and general-purpose applications from 800 to 2500 MHz. The AM1650DC838 provides 6 dB of coupling with flatness of ±1 dB from 800 to 2500 MHz, insertion loss of 1.5 dB or less, a VSWR of 1.2:1 or less, and 40 W power handling ability. Directivity is 20 dB, isolation is at least 20 dB, and intermodulation distortion is better than -140 dBc. It uses Type N connectors and measures 4.2" × 1.6" × 0.9".
Anatech Electronics Inc.,
Garfield, NJ
(973) 772-4242,
www.amcrf.com
SMA Connectors
CarlisleIT now offers an Enhanced Performance SMA connector series (EPSMA™) that provides mode free performance to 27 GHz. In addition, these connectors are tuned to provide ultra low VSWR to 27 GHz (typically 1.15:1). This new product offering consists of field replaceable styles with industry standard flange configurations and pin sizes; low RF leakage (less than 90 dB); and all interfaces conform to MIL-STD 348. Common configurations are in stock and available for immediate delivery.
Carlisle Interconnect Technologies,
St. Augustine, FL
(904) 829-5600,
www.carlisleit.com
Thin Film Ceramic Filters
DLI has introduced to the market its Thin Film Technology. DLI offers low pass and high pass filters, ceramic cavity filters and notched filters along with duplexers and diplexers. All filters employ DLI's high-K ceramics that allow for size reduction and temperature stability compared to alumina and PWB materials. Solder surface-mount and chip and wire filters are all possible.
Dielectric Laboratories Inc.,
Cazenovia, NY
(315) 655-8710,
www.dilabs.com
Low PIM Terminations
Florida RF Labs introduces a new line of high power terminations with low passive intermodulation (PIM) distortion levels. Due to higher demand in frequency spectrum usage, higher transmitter power levels and more sensitive receivers in modern telecommunication systems, PIM distortion has become a potential problem for design engineers globally. These new products are the only terminations available in the market that are guaranteed to have low PIM levels; it is part of the standard specifications and all products are 100 percent tested to guarantee the best performance. Datasheets and samples are available upon request. All products are available RoHS and REACH compliant.
Florida RF Labs,
Stuart, FL
(772) 286-9300,
www.rflabs.com
Variable Attenuators
The 50BA-series is an all-new line of variable attenuator systems. These plug-and-play modules come complete with Ethernet/RS-232 interfaces as well as manual control (via Momentary Lever Actuator Switches with 7-segment digital display). Designed to be easy to use, compact and affordable, the 50BAs are available with one or two channels of attenuation (0 to 63 dB or 0 to 95 dB in 1 dB steps) and operate from 0.2 to 6 GHz. Custom designs are also available.
JFW Industries Inc.,
Indianapolis, IN
(317) 887-1340,
www.jfwindustries.com
Hybrid Microwave Coupler
KRYTAR Inc. announces a new 180 degree hybrid coupler that delivers 3 dB of coupling over the broadband frequency range of 1 to 26.5 GHz in a single compact package. Hybrid couplers perform many functions, including splitting and combining signals in amplifiers, switching circuits, and antenna beam-forming networks used in a wide range of commercial and military applications. KRYTAR's new hybrid coupler, model 4010265, delivers this versatility from 1 to 26.5 GHz with excellent phase and amplitude matching. Typical specifications include amplitude imbalance: ±1.0 dB from 1 to 20 GHz and ±1.5 dB from 20 to 26.5 GHz; phase imbalance is ±16 degrees; isolation is >15 dB; maximum VSWR: 1.8 from 1 to 20 GHz and 1.95 from 20 to 26.5 GHz; insertion loss is 3.0 dB from 1 to 20 GHz and 3.6 dB from 20 to 26.5 GHz.
KRYTAR Inc.,
Sunnyvale, CA
(408) 734-5999,
www.krytar.com
Broadband Diode Switches
M/A-COM Tech introduced a family of Heterolithic Microwave Integrated Circuit (HMIC) broadband diode switches that use RoHS compliant Surmount™ packages. These rugged, monolithic switches operate up to 26 GHz, pro-vide low insertion loss and high isolation, and deliver up to +38 dBm CW power handling. The Surmount package technology provides a surface-mount chipscale configuration that is optimized for broadband performance with minimal associated parasitics, which are usually related to hybrid MMIC designs incorporating beam lead and PIN diodes that require chip and wire assembly. These broadband switches are ideally suited for military and test equipment applications.
M/A-COM Technology Solutions Inc.,
Lowell, MA
(978) 656-2539,
www.macomtech.com
Wilkinson Power Dividers
Marki Microwave expands its power divider family with new four-way power dividers. Model PD4-0218 covers 2 to 18 GHz while model PD4-0120 covers 1 to 20 GHz. Both dividers offer outstanding isolation and closely matched port-to-port amplitude and phase balance. These devices are reciprocal units that can be used to split or combine signals.
Marki Microwave,
Morgan Hill, CA
(408) 778-4200,
www.markimicrowave.com
Tuned-by-Design Injector-Diplexer
Microlab introduces a low cost Injector-Diplexer, to separate or combine the new LTE-2600 band (2400 to 2690 MHz) and GSM-850/900 bands (698 to 960 MHz). Using suspended substrate, the wireless frequency loss is minimized to less than 0.25 dB in all bands. 'Tuned-by-Design' eliminates the high cost of adjusting multiple cavities in conventional designs, while maintaining high 50 dB isolation between key bands, sufficient for most diplexer applications, such as sharing a common antenna or distributed antenna system. Passive InterModulation, PIM, is guaranteed to be <-150 dBc, and guarantees down to -160 dBc are available with an additional testing charge. Units are rated for average powers up to 250 W per input.
Microlab,
Parsippany, NJ
(973) 386-9696,
www.microlab.fxr.com
Tunable YIG Filters
Micro Lambda Wireless announces the production release of bench test YIG-tuned filters that operate in a frequency range from 500 MHz to 50 GHz. Bandpass or band reject models are available. Utilizing the entire Micro Lambda YIG-based tunable filter product line, customers can select from two-, three-, four-, six and seven-stage models in bandpass configurations and from eight-stage all the way through 16-stages for band reject configurations. Bandpass models carry a MLBFP-series description while the band reject are designated MLBFR-series. Units are specified over the standard lab environment of 0° to +60°C temperature range. Package size is 4" × 10" × 13".
Micro Lambda Wireless Inc.,
Fremont, CA
(510) 770-9221,
www.microlambdawireless.com
Two-way Power Divider
Pulsar model PS2-55-450/17S covers the frequency range of 1 to 40 GHz with 2.8 dB insertion loss, 10 dB isolation from 1 to 5 GHz and 13 dB from 5 to 40 GHz, and a maximum VSWR of 1.90:1. Amplitude and phase balance are 0.6 dB and ±8 degrees, respectively. Maximum input power is 10 W. 2.92 female connectors are utilized in a housing with dimensions 2.0" × 1.0" × 0.40".
Pulsar Microwave Corp.,
Clifton, NJ
(973) 779-6262,
www.pulsarmicrowave.com
RF Cable Assemblies
The TestPro range has been extended with the introduction of TestPro 3 RF cable assemblies that are precision engineered with advanced materials and are designed for extreme stability and flexibility. The cables have been tested for bending stability according to IEC 966-1, bending method number 2. Results show good phase stability as low as 5° typical with bending at 40 GHz. To meet the requirements for stability with handling during bench test use, the cables also offer loss stability of less than 0.1 dB variation with bending and 0.03 dB with shaking at the maximum frequency of 40 GHz. In addition, the cable and connectors are designed for long life, rated for a minimum of 20,000 bending cycles and 5,000 mating cycles.
Radiall USA Inc.,
Chandler, AZ
(480) 682-9400,
www.radiall.com
Precision SMA Adapters
Test grade adapters need to be rugged and versatile for use in lab or field applications. To meet this increasing need, RF Precision Products has released a complete line of the most popular test adapters covering SMA and N-types. Precision machined passivated stainless steel construction for long life, repeated use and corrosion resistance. All adapters feature epoxy captivated components and are designed for outstanding electrical performance with low loss and guaranteed low VSWR to 18 GHz. N to SMA adapters are suitable for use with the Anritsu Site Master™ line of test equipment and other similar popular brands.
RF Industries,
San Diego, CA
(858) 549-6340,
www.rfindustries.com
Single and Dual Directional Couplers
RLC Electronics' high power directional couplers offer accurate coupling, low insertion loss and high directivity in a compact package. The standard units are optimized for two octave bandwidths and are available with a choice of coupling values. These units are ideal for sampling forward and reflected power with a negligible effect on the transmission line and very low intermodulation products.
RLC Electronics Inc.,
Mount Kisco, NY
(914) 241-1334,
www.rlcelectronics.com
Amplifiers
Dual Output Amplifier
Model AML618P5012 is a high efficiency dual (combined) input, dual output power amplifier operating over 6 to 18 GHz bandwidth. The amplifier delivers +31 dBm power at each output and is designed to operate up to +95°C base plate temperature. AML-618P5012 is available with input power protection option up to 2 W CW. This design is available in a high-density package with 3.5"L × 1"W × 0.3"H. RF connectors are SMP. The DC supply is +10 V at 2.2 Amps.
AML Communications Inc.,
Camarillo, CA
(805) 388-1345,
www.amlj.com
Broadband Power Amplifier
The PGS27110341412 broadband power amplifier employs GaN technology to provide 12 W of saturated power from 27 to 1000 MHz. This high efficiency amplifier finds applications in communications, jamming, as well as test and measurement. Operational from a wide range 24 to 32 V DC supply, it incorporates features including blanking, forward and reverse sampling couplers, and an integrated receive path and T/R switch.
CAP Wireless,
Newbury Park, CA
(805) 499-1818,
www.capwireless.com
Power Amplifier
This 900 MHz compact linear power amplifier is the first in a series of communications amplifiers that are being developed for digital waveform requirements in the 450, 700, 800, 900, 1800, 1900 and 2100 MHz bands. The 7091 and this family of emerging products are well suited for use in commercial LTE networks and public safety wireless communications applications. The 7091 amplifier employs latest generation LDMOS device technology and is highly efficient. The amplifier has an advanced, built-in predistortion engine with wide instantaneous correction bandwidth, which ensures low distortion and wide dynamic range operation.
Empower RF Systems Inc.,
Inglewood, CA
(310) 412-8100,
www.empowerrf.com
LDMOS Power Transistors
Freescale Semiconductor unveiled three advanced industrial RF power transistors at an ideal price/performance ratio for original equipment manufacturers (OEM). The enhanced rugged capability combined with leading-edge RF performance enables OEMs to realize significant cost savings at the system level for industrial and commercial aerospace designs. Freescale's MRFE6VP5600H/S and MRFE6VP61K25H/S 50 V LDMOS power transistors offer enhanced ruggedness to support harsh environments in highly mismatched applications such as plasma generators, CO2 lasers and MRI power amplifiers. The MRF8P29300H/S 30 V LDMOS power transistor is designed for pulsed S-band applications such as air traffic control (ATC) and also can support modulated communications applications.
Freescale Semiconductor,
Austin, TX
(800) 521-6274,
www.freescale.com
Coaxial High Power Amplifier
The Mini-Circuits ZHL-100W-GAN+ utilizes high power Gallium Nitride (GaN) output stage, which results in higher efficiency (50 percent typical) as compared to GaAs, LDMOS and VDMOS counterparts. This high power amplifier operates in a frequency range from 20 to 500 MHz and features high output power, 100 W; GaN output stage; high output IP2, +84 dBm typical and high output IP3, +60 dBm typical. GaN FETs boast a maximum junction temperature of 250°C translating into higher operating temperatures without adversely affecting the MTBF. Feature advantages include: high efficiency - higher PAE results in significant cost savings over the operating life of amplifier; rugged design - extreme load mismatch such as open/short at output are tolerated without damaging the amplifiers; and range of protections - over temperature, over voltage and reverse polarity protection add to the ruggedness of the amplifier.
Mini-Circuits,
Brooklyn, NY
(718) 934-4500,
www.minicircuits.com
Low Noise Amplifier
MITEQ Inc. introduces a new addition to its family of K-band waveguide LNAs. Model JDM2WK-18002600-25-10P is a very low noise, high dynamic range waveguide front-end with WR-28 waveguide input and K(F) connector output. Additional options include pressure windows and three flange configurations, choke, grooved and cover. The JDM2WK-18002600-25-10P is lightweight and has a small profile and footprint. The aluminum alloy housing is environmentally sealed and also fully EMI shielded. The LNA includes reverse voltage protection and full internal regulation. Total weight is approximately 32 grams, and dimensions are 58.12 × 22.35 × 22.35 mm.
MITEQ Inc.,
Hauppauge, NY
(631) 436-7400,
www.miteq.com
Low Noise Amplifier
PMI amplifier model PEC-42-1G40G-20-12-292MM is an ultra-broadband low noise amplifier that operates in a frequency range from 1 to 40 GHz. This model provides a flat gain response while maintaining a typical output power of +20 dBm. Key specifications include operating frequency: 1 to 40 GHz; gain: +42 dB; gain flatness: ±2.5 dB; noise figure: 4.6 dB at 12 GHz; OP1dB: +22 dBm (1 to 18 GHz), +19 dBm (18 to 40 GHz); power supply: Single +12 VDC; connectors: 2.92 mm. Size: 1.37" × 1.0" × 0.6".
Planar Monolithics Industries,
Frederick, MD
(301) 662-5019,
www.pmi-rf.com
Material
High-thermal-conductivity Laminate
Rogers Corp. has introduced RT/duroid® 6035HTC, a new high-thermal-conductivity (HTC) laminate material engineered for low loss in high-power circuits. The fluoropolymer composite material is ideal for RF and microwave applications in military and high-reliability (hi-rel) applications required to handle high power levels, such as power amplifiers. Rogers RT/duroid 6035HTC laminates feature a relative dielectric constant of 3.5 at 10 GHz, making them suitable for a wide range of circuits employed in avionic and other military and hi-rel systems. The laminates incorporate a unique filler material to achieve superior heat-transfer characteristics compared to other high frequency circuit materials with similar dielectric constant.
Rogers Corp.,
Chandler, AZ
(480) 961-1382,
www.rogerscorp.com
Semiconductors/Integrated Circuits
Highly Integrated Demodulator
ADI introduced a new highly integrated demodulator for broadband applications, such as cellular base stations, satellite communications, point-to-point (PtP) radios and defense systems. ADI's new ADRF6850 demodulator expands ADI's RF/microwave product portfolio and offers the highest level of integration and functionality by combining five devices and three RF functions into one small-footprint, surface-mount chip. ADI's single-chip ADRF6850 demodulator saves considerable board space, reduces cost, and simplifies development by integrating a 60 dB VGA, a fractional-N PLL synthesizer with VCO and two baseband ADC drivers all in an 8 8 mm LFCSP package.
Analog Devices Inc.,
Norwood, MA
(781) 329-4700,
www.analog.com
QFN Packages to 50 GHz
Endwave has an advantage when housing its high-performance monolithic-microwave-integrated-circuit (MMIC) products in a surface-mount package. By re-engineering the widely accepted QFN, or Quad Flat No-leads surface-mount-technology (SMT) package, Endwave has more than doubled the usable frequency range of the housing, increasing its upper-frequency limit to 50 GHz and higher. A standard QFN package is a micro-lead-frame-type surface-mount-technology (SMT) housing designed to provide protection for MMICs and other semiconductors while also simplifying their attachment to printed-circuit boards (PCB). By their design, QFNs allow solder connections directly to PCB traces, without the complexity of fabricating plated through holes (PTH) in the circuit board. Standard lower-cost plastic-molded QFN packages operate to about 3 GHz, while conventional higher-performance air-cavity QFNs can be used to about 25 GHz.
Endwave Corp.,
San Jose, CA
(408) 522-3100,
www.endwave.com
Software
EM Simulation Software
Remcom announces an updated version of XFdtd® Release 7 (XF7), containing new functionality to shorten simulation setup time and output analysis. Notable enhancements include additional GPU acceleration for XACT Accurate Cell Technology and for plane wave simulations. Comprehensive improvements extend performance and usability, increasing throughput before and after the simulation: XACT Accurate Cell Technology mesh calculations have been accelerated up to 15 times; XStream® now supports NVIDIA's Fermi architecture, the most advanced CUDA-enabled GPU technology available; Arbitrary cut-planes facilitate interaction with complex models. These cut-planes are tightly integrated with XF7's advanced 2D Sketcher, allowing snapping and measuring of cut geometry.
Remcom Inc.,
State College, PA
(814) 861-1299,
www.remcom.com
Sources
Voltage-controlled Oscillator
Crystek's CVCO55CC-3475-3475 voltage-controlled oscillator (VCO) operates at 3475 MHz with a control voltage range of 0.5 to 4.5 V. This VCO features a typical phase noise of -115 dBc/Hz at 10 kHz offset and has excellent linearity. Output power is typically +7 dBm. Engineered and manufactured in the USA, the model CVCO55CC-3475-3475 is packaged in the industry-standard 0.5" × 0.5" SMD package. Input voltage is 8 V, with a maximum current consumption of 35 mA.
Crystek,
Fort Myers, FL
(239) 561-3311,
www.crystek.com
250 MHz Phase-locked Crystal Oscillator
The PLXO-250 phase-locked crystal oscillator operates at 250 MHz in a miniature connectorized package (1.5" sq × 0.6"). Featuring low spurs (-70 dBc), extremely-low harmonics (-50 dBc) and sub-harmonics (-70 dBc), the unit is locked to a 10 MHz external reference (or optional internal reference), and exhibits exceptionally-low phase noise (-120 dBc/Hz at 1 KHz), +7 dBm output power (maximum), while operating on a supply voltage of +12 VDC. The PLXO-250 is ideal for use with A/D and D/A converters, GPS carrier recovery loops or as reference sources for Ka-band and mm-Wave frequency converters, and various test equipment.
EM Research Inc.,
Reno, NV
(775) 345-2411,
www.emresearch.com
Voltage-controlled Oscillator
The model V500ME03-LF is a RoHS compliant voltage-controlled oscillator (VCO) in UHF-band. The V500ME03-LF operates at 500 to 1000 MHz with a tuning voltage range of 0 to 11 VDC. This VCO features a typical phase noise of -105 dBc/Hz at 10 kHz offset and a typical tuning sensitivity of 54 MHz/V. The V500ME03-LF is designed to deliver a typical output power of 10 dBm at 12 VDC supply while drawing 25 mA (typical) over the temperature range of -40° to 85°C. This VCO features typical second harmonic suppression of -13 dBc and comes in Z-Comm's standard MINI-16-SM package measuring 0.5" × 0.5" × 0.22".
Z-Communications Inc.,
San Diego, CA
(858) 621-2700,
www.zcomm.com
Subsystem
Radio Link RF Subsystem
DTI has announced the release of E-band Radio link RF subsystem. This subsystem operates over the E-band frequency spectrum from 71 to 86 GHz. One of its applications can be found in the E-band multi-gigabit wireless communication system, which offers local area networks and "Virtual Fiber" local loop for wireless transmission of data, voice and video at 1 to 10 Gbps speed. DTI's E-band radio link RF subsystem includes two transceiver blocks. The block A transmits at the frequency of 71 to 76 GHz and receives at 81 to 86 GHz, while the block B works at the opposite frequency ranges. Each block has transmitter (TX), receiver (RX), local oscillator (LO) chain and phase locked dielectric resonator oscillator (PLDRO) modules.
Ducommun Technologies Inc.,
Carson, CA
(310) 847-2859,
www.ducommun.com