Design of a Multi-Port Microwave Modulator for Dynamic Polarization Reconfiguration

MARTIN HURTADO; ALEJANDRO VENERE; CARLOS MURAVCHIK; JUAN IGNACIO FERNANDEZ MICHELLI

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Lugar: New York; Año: 2019 vol. 67 p. 1937 - 1945

0018-9480

This paper presents a seven-port modulator capable of switching the polarization state of the transmitting signal. Similar to the six-port modulator, the proposed device modulates the carrier signal through the reflection coefficients generated by four variable loads. The additional seventh port allows feeding two antennas or a dual-port antenna. The loads control both the complex envelope and the polarization of the transmitted carrier signal. The mathematical model of the device, developed in this paper, is applied to analyze its performance and different modes of operation. For validation, a prototype is manufacturedfor a center frequency of 1575.42 MHz. It is used to generate M-quadratic-amplitude modulation at different polarizations. The signals recorded at the output of the prototype show good agreement with the values predicted by the model.