Showing papers on "Ka band published in 1981"
01 Oct 1981
TL;DR: In this article, the design and performance of a fin-line integrated receiver front-end for Ka-band (26-40 GHz) frequencies is described, which consists of a balanced mixer including an IF filter, a gunn oscillator and a PIN-switch which can be used as STC for radar application or as noise references for a low-cost radiometer.
Abstract: The design and performance of a fin-line integrated receiver front-end for Ka-band (26-40 GHz) frequencies is described. The module consists of a balanced mixer including an IF filter, a gunn oscillator and a PIN-switch which can be used as STC for radar application or as noise references (in a closed state) for a low-cost radiometer. A description of the components and the performance of the unit is given.
8 citations
Proceedings Article•
01 Jan 1981
1 citations
01 Oct 1981
TL;DR: A hybrid Ka-Band mixer configuration was developed, using low cost "chip and wire" technique, and a DSB noise figure of 9.8 dB was achieved at 35 GHz.
Abstract: The development of more reliable and efficient solid-state sources up to the sub-mm-wave range has stimulated new interest in commercial applications. Three different approaches in this area can be distinguished, radar, radiometry and transmission measurement. Most of these applications work within short distances, up to about 10 m, thus leaving a high system back up. However, particular system requirements can be satisfied, using mm-wave components with reduced performance data. On this basis a hybrid Ka-Band mixer configuration was developed, using low cost "chip and wire" technique. A DSB noise figure of 9.8 dB was achieved at 35 GHz.
1 citations
TL;DR: In this article, the behavior of a multibeam antenna is determined by three major characteristics: beam topology, realizable radiation characteristics, and realizable beamforming network architecture.
Abstract: The behavior of a multibeam antenna is determined by three major characteristics: beam topology, realizable radiation characteristics, and realizable beamforming network architecture. Eight canonical topology plans have been developed and analyzed: angular separation between identical frequency cells, angular separation between orthogonally polarized identical frequency cells, number and configuration of cells forming coverage areas, and crossover level between nonidentical frequency band cells. A general topology plan is developed for the continental United States for 100-deg W synchronous satellite longitude.
1 citations
15 Jun 1981
TL;DR: In this article, a low noise solid state amplifier for replacement of a Ka-band TWTA is described, which provides a gain of 37 /spl plusmn/3 dB with an associated N. F. ranging from 13.3 to 16.3 dB in the 27-39.5 GHz band.
Abstract: A low noise solid state amplifier for replacement of a Ka-band TWTA is described. Eight stages of amplification, which utilize cathode notch InP Gunn diodes, provide a gain of 37 /spl plusmn/ 3 dB with an associated N. F. ranging from 13.3 to 16.3 dB in the 27-39.5 GHz band.