Wireless transceivers with filter arrangement for WiFi and LTE coexistence

摘要

Embodiments provide WiFi and LTE tailored transceiver radio frequency (RF) filtering techniques and configurations to enable coexistence between WiFi and LTE transceivers operating in close proximity. In particular, embodiments provide filtering techniques to reject emissions from LTE into WiFi, and vice versa. The filtering techniques eliminate the need for additional isolation between LTE and WiFi antennas (approximately 50 dB), which is beyond what is achievable in practice. Embodiments can be tailored according to different use cases of the WiFi and LTE transceivers (e.g., fixed CPE, portable router, smart phone with tethering).

主权项

1. A device, comprising:
an LTE transceiver; and a WiFi transceiver; wherein the LTE transceiver comprises:
an LTE radio frequency (RF) integrated circuit (RFIC); anda first RF analog front end, coupled to the LTE RFIC;wherein the first RF analog front end comprises:
an LTE transmit path, including a first LTE band-pass filter (BPF) and a first power amplifier (PA), the first LTE BPF placed before the first PA in the LTE transmit path, and wherein the first LTE BPF is configured to band-pass filter LTE transmissions from the LTE RFIC to reduce emissions outside of an LTE frequency band contained in the LTE transmissions; andfirst and second LTE receive paths, each including a first low-noise amplifier (LNA) and a second LTE BPF, the second LTE BPF placed before the first LNA in the first and second LTE receive paths.