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Current Techniques for Tuning Dielectric Resonators Electronic tuning of dielectric resonators over a relatively wide range while also preserving their characteristics is highly desirable, especially for use in nonaccessable systems such as airborne or spaceborne systems or in areas of high sophistication such as cellular radio systems. This article...

The Age of the Precision Oscillator: The Role of the TCXO and DCXO Bill Jennewein M-tron Industries Inc. Yankton, SD The need for quality, high precision timing devices is increasing daily. The heart of all communications is linked directly to a stable and dependable source of frequency control. Computer...

COMPONENTS SP4T Nonreflective Switch The model AS115-61 high isolation, SP4T nonreflective switch operates with 0 and -3 V or -5 V over the DC to 2 GHz frequency range. The switch delivers low insertion loss of 0.7 dB at 0.9 GHz with high isolation of 50 dB at 0.9...

MATERIALS Low Loss Dielectric Materials The ECCOSTOCK" series low loss dielectric materials for microwave applications feature dielectric constants ranging from 1.04 to 30 with loss tangents of < 0.002. The material is effective in antennas as a lens and in patch antennas as the spacer dielectric. It is also...

SYSTEM 800 MHz Data Transceiver The model DT800 800 MHz data transceiver operates over a frequency range of 806 to 866 MHz with an operating temperature range of -30° to +60°C. Additional features include a 25 W output power, forward error correction, data interleaving for burst error protection, high...

ANTENNAS Cellular/GSM Low Profile Patch Antenna The model S8248P12NF cellular/Global System for Mobile communications (GSM) antenna features a low profile design for minimum visual impact for discreet antenna installations. The unit is engineered with high quality etched copper circuitry to improve cellular service quality, decreasing both interference and lost...

  AMPLIFIERS Broadband, Small-signal Amplifier The model PE1-38-0218-12/-6V-SFF 2 to 18 GHz amplifier is capable of gains of more than 40 dB. The unit's noise figure is 5.5 dB (max) from 2 to 14 GHz and 6 dB (max) from 14 to 18 GHz. SWR is 2 (max), P1dB...

DEVICES 2 - 18 GHz Diode Detector The model DD-20-218-5PF-1N 2 to 18 GHz diode detector (useable to 500 MHz) features an ultra-fast response time of £ 5 ns, voltage sensitivity of 700 mV/mW (typ) and tangential signal sensitivity of -50 dBm at 2 MHz video bandwidth. Frequency flatness...

SOURCES Ultra-miniature Ceramic Chip Resonators The SSR series ultra-miniature ceramic chip resonators are supplied in a small surface-mount package measuring 3.2 x 2.1 x 1.5 mm and incorporate built-in load capacitors that simplify circuit designs and reduce assembly costs. The units are suitable for clock applications in cellular telephones,...

TEST EQUIPMENT Wideband Noise Generator The model TAS 430 wideband noise generator generates precise, user-programmed levels of additive white Gaussian noise, meeting the test requirements for a wide range of wireless communication applications, including cellular and PCS, WLL, WLAN, cordless telephone and satellite communications. The unit features easy-to-use front-panel...