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A Study of Ku-band Linearizer for Satellite TWTAs

Fan Pei-yun

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Abstract

The design and test results of a novel broadband linearizer is presented in this paper,which has been developed for space satellite system at Ku band.This linearizer architecture possesses new advanced shape tuning capability in addition to the classical magnitude control of the gain expansion and phase shift.This new feature is compatible with a wide band operation.A frequency bandwidth of 500 MHz has been demonstrated with a Ku-band TWTA between 12.25 and12.75GHz,and has the same characteristics at frequency bandwidth The linearizer can provide gain expansion up to 5dB and phase expansion up to 40 degree.A C/I3 improvement of about 26dB at-4dB input back-off(IBO) per carrier could be obtained by using this linearizer.

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What this paper is about

The design and test results of a novel broadband linearizer is presented in this paper,which has been developed for space satellite system at Ku band.This linearizer architecture possesses new advanced shape tuning capability in addition to the classical magnitude control of the gain expansion and phase shift.This new feature is compatible with a wide band operation.A frequency bandwidth of 500 MHz has been demonstrated with a Ku-band TWTA between 12.25 and12.75GHz,and has the same characteristics at frequency bandwidth The linearizer can provide gain expansion up to 5dB and phase expansion up to 40 degree.A C/I3 improvement of about 26dB at-4dB input back-off(IBO) per carrier could be obtained by using this linearizer.

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Available abstract

The design and test results of a novel broadband linearizer is presented in this paper,which has been developed for space satellite system at Ku band.This linearizer architecture possesses new advanced shape tuning capability in addition to the classical magnitude control of the gain expansion and phase shift.This new feature is compatible with a wide band operation.A frequency bandwidth of 500 MHz has been demonstrated with a Ku-band TWTA between 12.25 and12.75GHz,and has the same characteristics at frequency bandwidth The linearizer can provide gain expansion up to 5dB and phase expansion up to 40 degree.A C/I3 improvement of about 26dB at-4dB input back-off(IBO) per carrier could be obtained by using this linearizer.

Key concepts: Linearizer, Ku band, Broadband, Bandwidth (computing), Satellite, Communications satellite, Frequency band, Physics

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