Slotline reverse-phased hybrid ring coupler
First Claim
1. A microwave hybrid ring coupler comprising:
- a dielectric substrate having first and second sides;
a metallized layer formed on the dielectric substrate first side;
first, second, third and fourth sections of slotline transmission medium formed in said metallized layer and interconnected so as to form a substantially enclosed area of metallized layer, the fourth slotline transmission medium having a separation formed therein and having a first slotline portion extending from one side of said separation and a second slotline portion extending from the other side of said separation;
a first shorted slotline extending from one end of said first portion;
a second shorted slotline extending from one end of said second portion; and
a slotline-to-microstrip-to-slotline transition coupled to said first and second slotline portions.
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Accused Products
Abstract
A slotline directional coupler is disclosed that introduces a 180° phase reversal in one of the arms of the coupler in order to isolate opposite ports of the coupler. One of the arms of the coupler is split and a quarter wave shorted slotline is added to each portion of the split coupler arm. The split coupler arm is bridged by a short conductive strap that, in a first embodiment, is grounded on both ends to the slotline ground plane or in a second embodiment, is extended to appear as though grounded. In the first embodiment, the conductive strap is separated from the ground plane by air. In the second embodiment the dielectric substrate of the coupler separates the strap from the ground plane. The conductive strap serves as a slotline-to-microstrip-to-slotline transition which introduces a 180° phase shift in a signal propagating through it.
12 Citations
11 Claims
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1. A microwave hybrid ring coupler comprising:
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a dielectric substrate having first and second sides; a metallized layer formed on the dielectric substrate first side; first, second, third and fourth sections of slotline transmission medium formed in said metallized layer and interconnected so as to form a substantially enclosed area of metallized layer, the fourth slotline transmission medium having a separation formed therein and having a first slotline portion extending from one side of said separation and a second slotline portion extending from the other side of said separation; a first shorted slotline extending from one end of said first portion; a second shorted slotline extending from one end of said second portion; and a slotline-to-microstrip-to-slotline transition coupled to said first and second slotline portions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A microwave device for introducing a 180°
- phase shift in a microwave propagating signal comprising;
a first section of slotline transmission medium having an end; a second section of slotline transmission medium having an end adjacent said first section end and separated from said first section by a ground plane conductor, said ground plane conductor also encompassing said first and second sections of slotline transmission media; a first shorted slotline connected to said first section end; a second shorted slotline connected to said second section end; and a conductive strap bridging said first and second shorted slotlines and grounded to said ground plane conductor. - View Dependent Claims (11)
- phase shift in a microwave propagating signal comprising;
Specification