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The hybrid ring coupler, also called the rat-race coupler, is a four-port 3 dB directional coupler consisting of a 3λ/2 ring of transmission line with four lines at the intervals shown in figure 12. Power input at port 1 splits and travels both ways round the ring.
A slow-wave coupler is a directional coupler consisting of microstrip lines in which there is a corrugation in the inner edges of the transmission lines where the coupling takes place. The objective is to reduce the phase velocity of the odd mode of the coupled lines to match that of the even mode, and thereby to improve the isolation and ...
A magic tee (or magic T or hybrid tee) is a hybrid or 3 dB coupler used in microwave systems. [1] It is an alternative to the rat-race coupler. In contrast to the rat-race, the three-dimensional structure of the magic tee makes it less readily constructed in planar technologies such as microstrip or stripline.
Power divider in microstrip technology. In the field of microwave engineering and circuit design, the Wilkinson Power Divider is a specific class of power divider circuit that can achieve isolation between the output ports while maintaining a matched condition on all ports.
With directional couplers, directivity is a measure of the difference in dB of the power output at a coupled port, when power is transmitted in the desired direction, to the power output at the same coupled port when the same amount of power is transmitted in the opposite direction. [15]
The rat-race coupler has four ports, each placed one-quarter wavelength away from each other around the top half of the ring. The bottom half of the ring is three-quarter wavelengths in length. The ring has a characteristic impedance of factor 2 {\displaystyle {\sqrt {2}}} compared to port impedance.
In electronics, electric power and telecommunication, coupling is the transfer of electrical energy from one circuit to another, or between parts of a circuit. Coupling can be deliberate as part of the function of the circuit, or it may be undesirable, for instance due to coupling to stray fields.
This page was last edited on 9 June 2006, at 23:17 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply ...
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