A new microwave transistor test fixture is described incorporating a unique transistor insert design. The fixture is a modification of a commercial design, which allows a reduction of the manufacturing cost. The novel insert expands the capability of the test fixture to measure both packaged and unpackaged microwave transistors. Results of performance tests on a fixture prototype are briefly summa

A pattern rements iterative reconstruction Starting algorithm from from only amplitude field measuan is considered. procedure two sets of Fresnel field under data enables to obtain an estimate of the corresponding testing phase functions. In this way can be reconsctructed. the far field of the antenna 

The work under review concerns a new technique for the measurement of the radiation behaviour of reflector antennas under the restriction that the antenna itself is not rotated during the measurement. This condition exists for example with space-qualified antennas that are often very fragile and that would deform when rotated. Instead of rotating the antenna, the Compact Range feed is moved so tha

This paper discusses the technology of the feed diplexing system used in the development of a mUlti-frequency band antenna for the INTEL SAT earth station. The paper also describes the measured RF performance of this newly designed feed diplexing system. 

The Paper describes theoretical and experimental results for cost earth-station antenna. The antenna deploys a spherical an offset configuration. It yields a very low sidelobe envelope a slightly lower efficiency than conventional offset reflector a novel low reflector in with albeit antennas. 

The present paper deals with the H-Plane Sectoral Solid Dielectric Horn Antenna. Attempts have been made to deternine theoretically the approximate surface fields (Ampli tude and Phase) under several simplifying assumptions. A comparison has been made between calculated and experimentally observed values of one of the field components for both amplitude and phase at the front aperture of the anten

Problems involving antennas in the presence of a dissipative half space are considered in the present paper in terms of exact image theory. The effect of the image of the antenna is seen to be an addition to the Green function in the kernel of the antenna current integral equation. Also, field transmitted from the antenna through the interface is seen to be calculable as radiation from the corresp

A 5 to 19 GHz YIG tuned oscillator has been developped. From -40 to 90°C it good has a very low frequency deviation output from linearity is 10 dBm.- amplitude stability. The minimum power +- 15 MHz) and 

For a varactor tuned FET oscillator, a high ratio between maximum to minimum frequency is much more difficult to obtain as one goes up in frequency. It is shown that well designed multiple varactor type circuits must be used to reach Ku band with octave bandwidth. With non optimized 10 : 1 capacitance ratio varactors, a 2.4 frequency ratio has been reproducedly obtained, which is the best publishe

VCO) A wideband tuning method for dielectric resonator stabilized VCO (DR has been developed. By this new method, a wideband tunable DR VCO the mechanically tuning bandwidth ratio more than 8% has been realized 3 to 13 GHz bands. The obtained typical characteristics of DR VCO is as follows: mechanically tuning band from 10.1 to output power of +20 dBm +-l dB, and a modulation sensitivity less tha