Circuits and methods for non-reciprocal circulators and transceivers using same

Abstract

In accordance with some embodiments, non-reciprocal circulators are provided, the circulators comprising: a 3λX/4-long ring section having a first end and a second end, wherein λ is an operating wavelength of the non-reciprocal circulator; and a N-path filter having a first port, a second port, and N-paths, each of the N-paths being connected to the first port and the second port. In some of these embodiments, the 3λ/4-long ring section includes a transmit port, an antenna port, and a receive port. In some of these embodiments, the transmit port is λ/4 away from the antenna port. In some of these embodiments, the antenna port is λ/4 away from the receive port. In some of these embodiments, the receive port is at the first port of the N-path filter.

Dependencies are inferred from the claim text.