Weili L Wang

US Patent:

7042314, May 9, 2006

Filed:

Oct 23, 2002

Appl. No.:

10/277971

Inventors:

Chi Wang - Holmdel NJ, US
Weili Wang - Old Bridge NJ, US
William D. Wilber - Jackson NJ, US
William D. Blair - Freehold NJ, US

Assignee:

Radio Frequency Systems - Meriden CT

International Classification:

H01P 1/20
H01P 1/208
H01P 7/10

US Classification:

333202, 3332191, 333209

Abstract:

A delay filter uses the dielectric mono-block triple-mode resonator and unique inter-resonator coupling structure, having smaller volume and higher power handling capacity. The triple-mode mono-block resonator has three resonators in one block. An input/output probe is connected to each metal plated dielectric block to transmit microwave signals. Corner cuts couple a mode oriented in one direction to a mode oriented in a second, mutually orthogonal direction. An aperture between two blocks couples all six resonant modes, and generates two inductive couplings by magnetic fields between two modes, and one capacitive coupling by electric fields. The input/output probes, coupling corner cuts and aperture are aligned such that all six resonators are coupled in the desired value and sign, so constant delay on the transmitted signal within certain bandwidth can be achieved. By connecting the input and output probes to the base printed circuit board, the delay filter is surface mountable.

US Patent:

7327210, Feb 5, 2008

Filed:

Jun 15, 2004

Appl. No.:

10/866789

Inventors:

Bill Blair - Freehold NJ, US
Jeff Blair - Freehold NJ, US
Bill Engst - Marlboro NJ, US
Robert Laemmle - Freehold NJ, US
Greg Lamont - Jackson NJ, US
Weili Wang - Rocky Hill CT, US
William Wilber - Southbury CT, US

Assignee:

Radio Frequency Systems, Inc. - Meriden CT

International Classification:

H01P 7/00
H01P 7/04
H01P 7/06

US Classification:

333202, 333219, 333222, 333223, 333227, 333231

Abstract:

A microwave filter and method for remotely tuning a microwave filter from one sub-band to another sub-band using metallic rings to adjust the capacitance or inductance of the resonator. In adjusting the capacitance, a plurality of metallic rings are disposed in the upper section or end of the resonator. Each ring has an RF switch that connects or disconnects each ring to ground, thereby varying the capacitance of the resonator. In adjusting the inductance, a plurality of metallic rings are disposed perpendicular to the magnetic field of the resonator. Each ring has an RF switch disposed within the electrical path of the ring that opens or closes the electrical path of each ring. By opening and closing each ring, the magnetic field of the resonator is altered, thereby varying the inductance of the resonator.