公开(公告)号：US10367243B2

公开(公告)日：2019-07-30

申请号：US15584191

申请日：2017-05-02

Applicant: BAE SYSTEMS Information and Electronic Systems Integration Inc.

Inventor： Souleymane Gnanou ,  James M. Huggett

IPC: H01P1/203 ,  H01P7/08

Abstract: Low temperature co-fired ceramic (LTCC)-coupled stripline resonator filters for use as bandpass filters are implemented with combline topology or with interdigital topology. The filter bandwidths range from about 0.3 GHz to less than 1 GHz with frequency operation of about 0.1 GHz to 100 GHz. The filters have vias between adjacent resonators with via spacing significantly smaller than the wavelength at the filter center frequency to generate electrical walls between adjacent resonators resulting in coupling reduction for narrowband filter implementation. A narrowband filter transformer loading structure launches the input and the output to the first and last resonators.

公开(公告)号：US10371795B2

公开(公告)日：2019-08-06

申请号：US15425675

申请日：2017-02-06

Applicant: BAE SYSTEMS INFORMATION AND ELECTRONIC SYSTEMS INTEGRATION INC.

Inventor： James M. Huggett ,  Kevin S. Bassett

IPC: G01S7/02 ,  G01S13/88

Abstract: A radar warning receiver is disclosed. The radar warning receiver includes an antenna, a signal detection unit, a signal identification unit and an alarm. The antenna collects radio frequency (RF) signals. The signal detection unit is configured to generate a group of frequency and amplitude signals based on the collected RF signals. Specifically, the signal detection unit includes a pair of limiting amplifiers for converting the collected RF signals into corresponding pulsed output signals that track the actual frequency oscillations of the collected RF signals, and a pseudo-random noise generator for injecting noise into one of the limiting amplifiers. Based on the frequency and amplitude signals, the signal identification unit determines whether or not any of the collected RF signals includes a threat signal. The alarm is utilized to present a threat signal to a human operator.