K-Band Tracking System for Domestic Satellite Communication System

Inoue, Tatsuya; Kaitsuka, T.

doi:10.1109/taes.1981.309185

Cited by 6 publications

(1 citation statement)

References 8 publications

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“…The required antenna measurements include patterns and gain, additional noise contributed by the tracking circuitry, and tracking response frequency variations from group delay differences between the data and tracking channels. Closed loop tracking control systems are evaluated [1]- [3] by tracking a signal and injecting step function and triangular waveforms into the control loop to evaluate the control system step and ramp responses.…”

Section: Test Objectives and Methodologiesmentioning

confidence: 99%

Communication satellite antenna testing

Dybdal

2015

IEEE Instrum. Meas. Mag.

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C ommunication satellite systems necessarily require multi-disciplinary tests to assure and maintain effective system operation. This overview summarizes the overall testing for satellite communication systems and describes the subset of antenna and antenna-related testing in particular. Antenna test requirements address both RF and environmental specifications that include both launch and on-orbit extremes for space systems and wind and climate conditions for ground systems. In addition to characterizing antenna performance, other system test requirements have antenna-related measurements and test requirements. Satellite System RequirementsSatellite system evaluations have three distinct test phases, development tests, qualification tests, and on-orbit tests [1], as Fig. 1 shows. Development tests establish design compliance with system requirements. Qualification tests establish flight hardware that maintain the performance achieved in development testing, identify any workmanship shortfalls, and determine flight-worthiness of the integrated satellite. On-orbit tests initially establish operational compliance with the system's requirements, and have the capability to monitor, diagnose, and identify potential performance shortfalls over the satellite's lifetime.Ground segment evaluations [1] follow a similar path, as illustrated in Fig. 2. However, these evaluations must also address both cost effective tests for the large volume of user terminals manufactured and more extensive tests for large ground terminals (e.g., in mission control and gateway applications) and the additional requirements they have for system control and diagnostics. Ground segment designs significantly capitalize on available commercial off-the-shelf (COTS) products, require equipment selection between alternative vendors, and need to be developed using specific program requirements. The larger ground terminal antennas have decades-long lifetimes, and because of their cost, have separate sustainment plans that allow terminal antennas to incorporate and satisfy new requirements and to replace older equipment with maintenance issues.A requirement verification matrix is constructed at the program inception that describes the tests needed to demonstrate design compliance. This matrix is then used to determine test and facility requirements, instrumentation, test methodologies, software processing for the program, and detailed test plans. System designs must pay particular attention to provide an adequate number of test points to allow both characterization and diagnostic measurements. The space segment requires attention to telemetry points to provide insight for operational diagnostics. Larger ground terminals are typically financially incentivized by availability requirements and require close attention to redundancy and built-in-test equipment (BITE) capabilities to restore service in a timely fashion, particularly with today's trends toward remote operation. Providing proper attention to these issues at the program's inception is essential...

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Section: Test Objectives and Methodologiesmentioning

confidence: 99%

Communication satellite antenna testing

Dybdal

2015

IEEE Instrum. Meas. Mag.

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Monopulse pattern‐forming method for an off‐focus RF sensor

Ueno

1992

Electron. Comm. Jpn. Pt. I

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To improve the accuracy of the beam-pointing direction of the satellite-borne antenna, it is effective to attach an accurate RF sensor to such an antenna. On the other hand, it is not possible to place a monopulse horn for the RF sensor at the focal point of the antenna due to the use of the multihorn approach in the communication signal horn. Often the monopulse pattern is significantly degraded.In this paper, a method is presented for forming a desired monopulse pattern even under such an adverse condition. The least-square method is used for detennination of the amount of adjustment for the amplitude and phase for each horn. It is shown that the type of tracking receiver is related to the evaluation of the obtained pattern. At the same time, the tracking receiver is related to the evaluation of the obtained pattern. At the same time. the tracking receiver is modeled and a pattern evaluation method is proposed by observing the angular detection error at the output end of the tracking receiver. As an example, the present method is applied to the RF sensor displaced by six times the 3 d B beamwidth in an antenna with an aperture diameter of 350 wavelengths. It is found that a monopulse pattern is acquired with distortions as small as those for an RF sensor on the focal point and the angular detection error is about one-fourth the results in the conventional method if three constraint points on the difference pattern are chosen.As an RF sensor using the communication antenna, several types have been conceived for the feed horn, feed network, and tracking receiver. For instance, the feed horn can be a higher-order mode horn and a multihorn. The tracking receiver can be classified according to the 82 ISSN8756-662 1 /92/OOO2-OO82$7.50/0 1992 Scripta Technica, Inc.

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Design of multimode tracking system for earth station antenna

Pandey¹

2016

2016 Asia-Pacific Microwave Conference (APMC)

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K-Band Tracking System for Domestic Satellite Communication System

Cited by 6 publications

References 8 publications

Communication satellite antenna testing

Communication satellite antenna testing

Monopulse pattern‐forming method for an off‐focus RF sensor

Design of multimode tracking system for earth station antenna

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