Miniature Hybrid Spans 0.5 to 1.0 GHz
Model 2164-90 is a miniature 90-deg. hybrid designed for use from 500 MHz to 1 GHz. It provides 25-dB minimum isolation between ports with maximum VSWR of 1.25:1 and maximum insertion loss of 0.25 dB. The hybrid coupler, which is supplied with SMA female coaxial connectors, measures just 3.25 × 1.19 × 0.50 in., but can handle 100 W average power and as much as 5 kW peak power.
ARRA, Inc., 15 Harold Ct., Bay Shore, NY 11706-2296; (516) 231-8400
Rack-Mount Amplifier Powers 6 to 18 GHz
Model BME69189-20 is a Class AB linear solid-state amplifier module capable of 20 W output power from 6 to 18 GHz in a housing measuring just 6.56 × 3.50 × 0.84 in. and weighing 1.4 lb. It achieves more than 41 dB gain (and typically 45 dB gain) at 20 W output power, reaching 3-dB compression output power with +10 dBm input power. The gain flatness is within ±4 dB. Second harmonics are better than −15 dBc, while third harmonics are less than -25 dBc; spurious content is less than -60 dBc. The amplifier module is powered by +28 V dc and is designed for operating temperatures from −40 to +55°C. It is supplied with SMA female field-replaceable connectors.
Comtech PST, 105 Baylis Rd., Melville, NY 11747; (631) 777-8900
GaAs MMIC Amplifier Drives 26 to 35 GHz
Model CMD243 is a balanced GaAs MMIC driver amplifier impedance matched to 50Ω. It is supplied in die form and designed to provide 15.5-dB from 26 to 35 GHz with noise figure of 4.4 dB and +21 dBm output power at 1-dB compression. It runs on voltage supplies from +3 to +7 V dc and draws 90 mA typical supply current. The driver amplifier can handle operating temperatures from −55 to +85°C.
Custom MMIC, 300 Apollo Dr., Chelmsford, MA 01824; (978) 467-4290,
GaN Amplifiers Operate to 7.5 GHz
A line of off-the-shelf GaN power amplifiers (PAs) includes models with high gain levels from 43 to 60 dB for mostly broad frequency bands from 30 MHz to 7.5 GHz. Saturated output power levels range from 10 to 100 W with as much as 35% power-added efficiency (PAE). Harmonics are held to −15 to −20 dBc. The PAs, which are internally matched to 50Ω, are suitable for commercial and military radar, jamming systems, medical imaging, communications, and electronic-warfare (EW) applications. They incorporate single, internally regulated voltage supplies. Some models are also equipped with integrated heat sinks and cooling fans.
Fairview Microwave, 1130 Junction Dr., Ste. 100, Allen, TX 75013; (972) 649-6678
Benchtop Scope Doubles as Portable Tester
Model DSC-5300 is a general-purpose, low-frequency digital storage oscilloscope (DSO) that is equally at home on a benchtop or in the field. The two-channel instrument features a 50-MHz bandwidth and operates with single-channel real-time sampling rates to 500 MSamples/s. It provides 32 kpoints of memory and shows signal waveforms on a 7-in. color liquid-crystal-display (LCD) screen. As many as 10 waveforms and as many as 20 scope settings can be saved to internal memory, and a built-in Universal Serial Bus (USB) allows control and data transfer with an external computer. P&A: stock; $349.
Global Specialties, 22820 Savi Ranch Pkwy., Yorba Linda, CA 92887; (800) 572-1028
Coaxial Adapters Keep PIM Under Control
A line of coaxial adapters well suited for distributed antenna systems (DAS) is available for use with 7/16 DIN, SMA, Type N, and 4.1/9.5 standard and bulkhead connectors. With passive intermodulation (PIM) performance of typically −165 dBc or better, these adapters help minimize intermodulation in wireless base stations as well as in-building wireless communications infrastructure systems, including for Fourth-Generation (4G) and Fifth-Generation (5G) cellular communications equipment.
MECA Electronics, Inc., Denville, NJ 07834; (866) 444-6322, e-mail: [email protected]
Attenuator Has 60-dB Range from 6 to 12 GHz
Model PDVAN-6012-60-8 is an 8-b programmable PIN diode attenuator with 60-dB total attenuation range and 0.25-dB step resolution from 6 to 12 GHz. The maximum insertion loss is 2.8 dB, with more typical measured insertion loss of 2.13 dB. The VSWR is 2.0:1 or better and typically 1.70:1. The attenuator is rated for as much as +20 dB continuous-wave (CW) output power and can survive surges as high as 1 W (+30 dBm). Attenuation flatness is better than ±0.7 dB at 10-dB attenuation, better than ±1.5 dB at 40-dB attenuation, and better than ±1.6 dB at 60-dB attenuation. The compact attenuator, which is supplied with SMA female connectors and 15-pin subminiature-D male connectors and 8-b transistor-transistor-logic (TTL) control, measures just 2.00 × 1.80 × 0.50 in. It draws a maximum of 150 mA from +12 to +15 V dc and a maximum of 75 mA from −12 to −15 V dc.
PMI, 7311-F Grove Rd., Frederick, MD 21710; (301) 662-5019, e-mail: [email protected]
High-Q MLCCs are Stable with Temperature
The H series of high-quality-factor (high-Q) multilayer ceramic capacitors (MLCCs) provide stable performance in high-temperature, high-frequency circuits. The tiny components feature an extended operating temperature range of −55 to +150°C. They are available in a wide range of values and case styles, including 0603 and 0805 packages. The capacitors, which are suitable for impedance matching and DC blocking, are designed for long, reliable operating lifetimes in applications with wide operating temperature ranges, such as automotive electronics and small cellular base stations.
Syfer Technology Ltd. (part of Knowles Capacitors), Old Stoke Rd., Norwich NR14 8SQ, UK; +44 1603 723300, e-mail: [email protected]