The last active component of a transmitting chain for communications, i.e., the high-power amplifier (HPA) is expected to operate under controlled termination conditions in order to guarantee that its actual performance is compliant with the nominal one. However, since its termination is represented by the antenna, significant deviations from the anticipated conditions may arise in the presence of obstacles in the proximity of the transmitter. In addition to temporary performance degradation, extreme variations of the HPA's load can even end up in device destruction, with permanent loss of functionality. This undesired occurrence may manifest both after the deployment and, due to human error, even during the acceptance test of the system. The most straightforward solution to this problem is by inserting nonreciprocal components (isolators) between the HPA and the antenna, but at the cost of giving up full integrability. As an alternative, we propose a scheme based solely on reciprocal elements (therefore, integrable) which, under mild assumptions, provides an effective mitigation of undesired load variations and of their detrimental effects at device level.
Colangeli, S., Ciccognani, W., Longhi, P.e., Serino, A., Limiti, E. (2022). A Transmitter Protection Scheme through Reciprocal Elements. In Asia-Pacific Microwave Conference Proceedings, APMC (pp.473-475). Institute of Electrical and Electronics Engineers Inc. [10.23919/APMC55665.2022.9999944].
A Transmitter Protection Scheme through Reciprocal Elements
Colangeli S.;Ciccognani W.;Longhi P. E.;Serino A.;Limiti E.
2022-01-01
Abstract
The last active component of a transmitting chain for communications, i.e., the high-power amplifier (HPA) is expected to operate under controlled termination conditions in order to guarantee that its actual performance is compliant with the nominal one. However, since its termination is represented by the antenna, significant deviations from the anticipated conditions may arise in the presence of obstacles in the proximity of the transmitter. In addition to temporary performance degradation, extreme variations of the HPA's load can even end up in device destruction, with permanent loss of functionality. This undesired occurrence may manifest both after the deployment and, due to human error, even during the acceptance test of the system. The most straightforward solution to this problem is by inserting nonreciprocal components (isolators) between the HPA and the antenna, but at the cost of giving up full integrability. As an alternative, we propose a scheme based solely on reciprocal elements (therefore, integrable) which, under mild assumptions, provides an effective mitigation of undesired load variations and of their detrimental effects at device level.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
