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The orthogonal LMBA: a novel RFPA architecture with broadband reconfigurability

Collins, David J., Quaglia, Roberto, Powell, Jeff and Cripps, Stephen 2020. The orthogonal LMBA: a novel RFPA architecture with broadband reconfigurability. IEEE Microwave and Wireless Components Letters 30 (9) , pp. 888-891. 10.1109/LMWC.2020.3010817

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A novel RF power amplifier (RFPA) architecture, the orthogonal load-modulated balanced amplifier, or OLMBA, is described and demonstrated. Compared to the load-modulated balanced amplifier (LMBA), the OLMBA displays many of the same benefits, such as active adaptive tuning using the phase and amplitude of an external control signal, but with much lower power requirements on the control signal power (CSP). As such, a useful range of active tuning can be implemented with essentially no impact on overall efficiency due to the low level of a control signal. A demonstrator is described and measured, which delivers 30 W at a minimum of 50% efficiency over a 0.65-3.25-GHz bandwidth.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
ISSN: 1531-1309
Date of First Compliant Deposit: 27 July 2020
Date of Acceptance: 17 July 2020
Last Modified: 11 Feb 2021 15:24

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