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Prigoda, B. A.

Publications and source records attributed to Prigoda, B. A..

7 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS1974

Selection of an optimal plan for construction of a spacecraft antenna system

An attempt is made to summarize the experience of the design of antennas for various types of spacecraft: fully oriented, partially oriented, and with arbitrary orientation. Several examples of the construction of antenna systems and their characteristics are given. The optimal relationship between weight, dimension and power characteristics of on-board devices allows selection of the most acceptable versions. Questions are presented for consideration in design of optimal spacecraft antenna-feeder systems.

Prigoda, B. A.↗
NASA NTRS1974

Circularly polarized antennas with controlled radiation patterns

Log-helix conical antennas were examined as a way to satisfy the requirement for circular polarization of antennas for spacecraft use. It was concluded that a multiple-helix antenna which allows the helix lead angle to be changed can be used when the radiation and directivity in the direction of the reception point must be changed during flight.

Prigoda, B. A.↗
NASA NTRS1974

High frequency switching devices

Switching devices using various circuits of electronic or mechanical elements depending on the operating conditions and purpose of the switching were investigated and their uses are discussed.

Prigoda, B. A.↗
NASA NTRS1974

SHF filters in spacecraft antenna-feeder systems

The use of SHF-band filters in spacecraft antenna-feeder systems was investigated. These filters, depending on specific applications and requirements, may be constructed both of elements with lumped constants and of elements with distributed parameters.

Vlasov, Y. A.↗
NASA NTRS1974

Checking the parameters of AFS in spacecraft in flight

The use of elements for remote testing of matching of on-board spacecraft antennas, required by the need to receive timely telemetry information on the quality of operation of antenna-feeder systems (AFS) during long flights, is discussed. Information on the traveling wave ratio deficiency to the AFS allowed improvement of quality and reliability of communications with spacecraft and developed telemetric information on the matching of on-board antennas, the efficiency of the feeder system and power of transmitters during long flights.

Vlasov, Y. A.↗
NASA NTRS1974

The problem of controlling the directivity of low directivity antennas on spacecraft in flight

Interests exist in the creation of antennas allowing adjustment of the radiation pattern and directivity in flight without using complex switching and matching circuits. Results are presented of certain experimental tests performed with log-periodic conical helical antennas to determine the possibilities of regulation of their radiation patterns without changing the structure of the current-carrying elements, supply connections, etc.

Mashkov, V. I.↗