180 degree hybrid coupler and dual-linearly polarized antenna feed network

摘要

A 180° hybrid coupler includes three coupled-line couplers connected between two inputs and two outputs. Each of the three coupled-line couplers is defined by at least one ground conductor and only two signal conductors.

主权项

1. A 180° hybrid coupler comprising:
a circuit having first and second inputs and first and second outputs, the circuit comprising first, second, and third coupled-line couplers and a transmission line, wherein each of the first, second, and third coupled-line couplers is defined by at least one ground conductor and first and second signal conductors, and wherein: the first input is connected to the first signal conductor of the first coupled-line coupler at a first end of the first coupled-line coupler; the second signal conductor of the first coupled-line coupler is terminated to ground at the first end of the first coupled-line coupler, the second signal conductor of the first coupled-line coupler is connected to the first output at a second end of the first coupled-line coupler; the second signal conductor of the first coupled-line coupler is connected to the first signal conductor of the third coupled-line coupler at the second end of the first coupled-line coupler and at a first end of the third coupled-line coupler; the transmission line is connected to the first signal conductor of the first coupled-line coupler at the second end of the first coupled-line coupler; the transmission line is connected to the first signal conductor of the second coupled-line coupler at a first end of the second coupled-line coupler; the first signal conductor of the second coupled-line coupler is terminated in an open circuit at a second end of the second coupled-line coupler; the second signal conductor of the second coupled-line coupler is terminated to ground at the second end of the second coupled-line coupler; the second signal conductor of the second coupled-line coupler is connected to the second output at the first end of the second coupled-line coupler; the second signal conductor of the second coupled-line coupler is connected to the second signal conductor of the third coupled-line coupler at the first ends of the second and third coupled-line couplers; the first and second signal conductors of the third coupled-line coupler are connected to each other at a second end of the third coupled-line coupler; the first and second signal conductors of the third coupled-line coupler are connected to the first and second outputs, respectively, at the first end of the third coupled-line coupler; and the second input is connected to the second end of the third coupled-line coupler.