Broadband Power Amplifier With a Novel Tunable Output Matching Network
This broadband power amplifier module has potential use in several wireless communication systems, such as GSM, DCS, PCS and CDMA systems and other high frequency bands.
University researchers have developed an InGaP/GaAs heterojunction bipolar transistor (HBT) monolithic microwave integrated circuit (MMIC) broadband power amplifier with a novel tunable output matching circuit is first proposed and implemented. The 3-stage MMIC broadband power amplifier is realized by using the novel HBT structure and layout, applying broadband and compensating matching technique in matching network design, adopting power gain predistortion at the first stage, and optimizing the distribution of power gain among stages. The output matching circuit is implemented with parallel L_C tank circuits using PIN diodes to control the inductor value. This broadband power amplifier module (PAM) offers the advantage of tunable frequency band, low insertion loss, small size and high linearity.
Patent Number: US7830527B2
Application Number: US2008102240A
Inventor: Chen, Jeffrey R.
Priority Date: 13 Apr 2007
Priority Number: US7830527B2
Application Date: 14 Apr 2008
Publication Date: 9 Nov 2010
IPC Current: G01B001102
US Class: 356489 | 356511
Assignee Applicant: The United States of America as represented by the Administrator of the National Aeronautics and Space Administrationshington
Title: Multiple frequency optical mixer and demultiplexer and apparatus for remote sensing
Usefulness: Multiple frequency optical mixer and demultiplexer and apparatus for remote sensing
Novelty: Remote sensing and mapping system includes illumination source having two optical doublers comprising optical doubling crystals tuned to different frequencies
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Tech ID/UC Case 18813/2005-580-0 Related Cases 2005-580-0
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