公开(公告)号：US12237850B2

公开(公告)日：2025-02-25

申请号：US17934758

申请日：2022-09-23

Applicant: Eridan Communications, Inc.

Inventor： Hazal Yüksel ,  Douglas Kirkpatrick ,  Dubravko Babić

IPC: H04B1/00 ,  H04B1/10 ,  H04B1/30

Abstract: A wideband-tunable radio frequency (RF) receiver having a tunable RF bandpass filter (RF BPF) and passive mixer-first receiver (PMF-Rx) is disclosed. The tunable RF BPF and PMF-Rx operate synergistically, exploiting the intrinsic impedance translation property of the PMF-Rx, to suppress out-of-band interferers as well as in-band interferers at the receiver front end and thereby enhance the receiver's signal-to-noise ratio and overall dynamic range. In one embodiment of the invention the tunable RF BPF and PMF-Rx are independently tunable and afford the receiver the ability to reject or suppress interferers that might not otherwise be able to be rejected or suppressed.

公开(公告)号：US11949546B2

公开(公告)日：2024-04-02

申请号：US17804626

申请日：2022-05-31

Applicant: Eridan Communications, Inc.

Inventor： Fran Kostelac ,  Ante Brizić ,  Dubravko Babić

IPC: H04L27/36 ,  H03F3/217 ,  H03F3/24 ,  H04L27/04

CPC classification number: H04L27/361 ,  H03F3/217 ,  H03F3/245 ,  H04L27/04 ,  H03F2200/451

Abstract: A modulated RF carrier produced at the output of the polar transmitter's switch-mode power amplifier (SMPA) is conveyed to an output filter network comprising a harmonic low-pass filter (LPF) connected in parallel with an absorptive high-pass filter (HPF). Together the harmonic LPF and absorptive HPF pass the fundamental component of the modulated RF carrier to the polar transmitter's load while also absorbing higher harmonic components that would otherwise be undesirably reflected back toward the output of the SMPA.