No title available

• US 3,681,714 A
• Filed:
• Issued:
• Est. Priority Date: 03/06/1969
• Status: Expired due to Term

• Current Assignee: N/A
• Original Assignee: N/A
• Time in Patent Office: Days
• US Class Current: 333/21.00R
• CPC Class Codes: H01P 1/067 the energy being transmitted in only one line located on the axis of rotation

Abstract

In an impedance matching transformer for a microwave transmission line wherein a pair of orthogonal rectangular waveguides are joined by a rotatable coaxial line including an inner conductor protruding into the interior of one of the waveguides to act as an impedance matching probe, an adjustable screw is provided through a wall of the one waveguide positioned right above the probe to attain impedance matching.

Claims

1. In an impEdance matching transformer for a microwave transmission line wherein a pair of orthogonal rectangular waveguides are joined by a rotatable coaxial line including an inner conductor protruding into the interior of one of said waveguides through a broad wall thereof perpendicularly to said broad wall to act as an impedance matching capacitive probe, the improvement therein which comprises having an adjustable screw extending through the opposite wall of said one waveguide and coaxially with said probe, said screw being adjustable to establish impedance matching at the joint between said waveguides.

2. An improvement according to claim 1 wherein one end of said one waveguide is closed by a short-circuiting plate at a predetermined distance from said probe and said adjustable screw.

3. An improvement according to claim 1 wherein said rotatable coaxial line comprises a first outer conductor secured to said one waveguide and a second outer conductor secured to the other waveguide, the joint between said first and second outer conductors being provided with a slit so shaped as to minimize the leakage of wave energy at said joint.