Phased Array Antenna Amplifier Exploratory Development Model (100 watts).

摘要

The Phased Array Antenna Amplifier Exploratory Development Program will provide analysis, design and construction techniques to fabricate a scale model for a mechanically steerable phased array antenna amplifier for troposcatter communication system applications. The ultimate goal of this analysis is to determine the technical capabilities, limitations, constraints and cost feasibility for a lkw system. Implementation of this program requires analysis in two major technical areas: Matstup (Printed) antenna and solid state high power generation and combining. During this reporting period - June 1977 to December 1977 - low loss combining techniques coupled with efficient amplifier design attained 8.9 watts at 4.7 Ghz with a 1 db bandwidth covering 4.4 Ghz to 5.0 Ghz. Computer programs were generated and validated to aid in the design of the antenna dipole excitation pattern required to achieve the 30 dbi gain and 15 db sidelobes. These programs also provided the capability to analyze antenna performance degradation vs. amplitude and phase errors introduced as a result of fabrication and RF excitation. During the next reporting period, a 38 inch by 38 inch antenna array employing an amplitude taper will be fabricated and tested. Assembly and test of the basic power modules will be in progress and the IPA amplifier chain will be complete. (Author)