US 10,594,291 B2 · Branch-line coupler

Abstract

A branch line coupler and active antenna system are provided. In an embodiment, the branch line coupler comprises four resonators. The four resonators are formed by a body and a grounded element. A resonator comprises a capacitor element and an inductor element. A first portion of the capacitor element comprises at least a portion of the body and a second portion comprises at least a portion of the grounded element. The inductor element is connected to the capacitor element in parallel. The inductor element comprises at least a portion of the body and extends to the grounded element. The first and second resonators are coupled by a first coupling, the second resonator and the third resonator are coupled by a second coupling, the third resonator and the fourth resonator are coupled by a second third coupling, and the fourth resonator and the first resonator are coupled by a fourth coupling.

Claims20

Dependent claims

A branch line coupler, comprising:

four resonators formed by a body and a grounded element, with a resonator of the four resonators comprising:
a capacitor element, with a first portion of the capacitor element comprising at least a portion of the body and with a second portion comprising at least a portion of the grounded element;
an inductor element connected to the capacitor element in parallel, with the inductor element comprising at least a portion of the body and extending to the grounded element;
a first resonator and a second resonator of the four resonators are coupled by a first coupling, the second resonator and a third resonator of the four resonators are coupled by a second coupling, the third resonator and a fourth resonator of the four resonators are coupled by a third coupling, and the fourth resonator and the first resonator are coupled by a fourth coupling.

1 more element

Dependencies are inferred from the claim text.

Branch-line coupler

Life of this patent

Branch-line coupler

Life of this patent

Abstract

Claims20