Invention Grant
- Patent Title: Continually variable analog phase shifter
- Patent Title (中): 连续可变模拟移相器
-
Application No.: US364414Application Date: 1989-06-12
-
Publication No.: US4961062APublication Date: 1990-10-02
- Inventor: John P. Wendler
- Applicant: John P. Wendler
- Applicant Address: MA Lexington
- Assignee: Raytheon Company
- Current Assignee: Raytheon Company
- Current Assignee Address: MA Lexington
- Main IPC: H01Q3/36
- IPC: H01Q3/36 ; H03H7/20
Abstract:
An analog phase shifter is provided by cascading T high pass filter and .pi. low pass filter sections. The low pass filter network is selected to have a cut-off frequency above the highest frequency in a predetermined frequency range of the phase shifter and includes a fixed inductor element as a series element of the network and a pair of variable capacitor elements disposed in shunt between said inductor element and ground. The high pass filter network has a cut-off frequency below the lowest frequency of the predetermined frequency band. The network includes a fixed inductor element disposed as a shunt element of said network and a pair of variable capacitor elements disposed in series. The inductor element is coupled between a common connection of said pair of variable capacitor elements and the reference potential. The .pi. network and the T network are cascaded connected between the pair of terminals of the network. The voltage level is fed to each one of the variable capacitor elements and provides a variable capacitance in response thereto and thus imparts to said network a variable phase shift over the operating frequency range of the phase shifter.
Public/Granted literature
- US4432533A Flame gunning of refractory linings Public/Granted day:1984-02-21
Information query