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Effect of Discontinuities on the Group Delay of a Microwave Transmission Line (Short Papers)
The problem is considered of the effect of reflections from discontinuities at each end of a transmission line on the group delay at microwave frequencies. Previous work is briefly reviewed and aExpand
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An experimental investigation of the changes of VLBI time delays due to antenna structural deformations
Structural deformations primarily occur as functions of antenna elevation angle due to gravity loading. For a Cassegrain antenna, one of the major effects of structural deformation on measured VLBIExpand
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Power loss for multimode waveguides and its application to beam-waveguide system
The conventional way of expressing power loss in decibels/meter for a multimode waveguiding system with finite wall conductivity (such as a beam-waveguide (BWG) system with protective shroud) can beExpand
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The fractional frequency stability of a 34-m-diameter beam-waveguide antenna
Advances in fiber-optic technology have made it possible to develop a new technique to isolate and measure the frequency stability of a large beam-waveguide (BWG) antenna. Through the use of theExpand
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The electrical conductivities of candidate beam-waveguide antenna shroud materials
The shroud on the beam-waveguide (BWG) antenna at DSS 13 is made from highly magnetic American Society for Testing and Materials (ASTM) A36 steel. Measurements at 8.42 GHz showed that this materialExpand
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Antenna noise temperatures of the 34-meter beam-waveguide antenna with horns of different gains installed at F1
This article presents a set of theoretical and measured zenith-antenna noise temperatures at 8.45 GHz for the DSS-13 34-m beam-waveguide antenna when horns of different gains are installed at F1. TheExpand
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Radiometric tests on wet and dry antenna reflector surface panels
The results of X-band noise temperature tests on two types of antenna surface panels are presented. The first type tested was a solid antenna panel, while the second type was a perforated panel withExpand
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A portable Ku-band front-end test package for beam-waveguide antenna performance evaluation
A 34-m beam-waveguide (BWG) antenna has been built a Deep Space Station 13 (DDS 13) in the Goldstone Deep Space Communications Complex. This antenna is designed to be efficient at X-, Ku-, andExpand
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