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Contents ü History ü What is Magic Tee ? ü Microwave T-junctions ü Two-port network ü E-plane tee ü H-plane tee ü MAGIC TEE (HYBRID TEE) ü Characteristics of magic tee ü Electric field pattern of magic tee ü Application of Magic Tee
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HISTORY
Ø A magic tee is a four-port, 180 degree hybrid splitter, realized in waveguide. Ø Originally developed in World-War II, and first published by W. A. Tyrell in a 1947 IRE paper
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What is Magic Tee ???
Ø It is a microwave hybrid circuit. Ø A magic tee is a combination of the E-plane tee and H-plane tee.
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Microwave T-junctions
Ø In microwave circuits a waveguide or coaxial-line junction with three independent ports is commonly referred to as Tee junction. There are several types of Tee junctions like E-plane Tee junction H-plane Tee junction E-H plane Tee junction (Magic Tee) Rat race junction
Ø 1. 2. 3. 4.
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Why Microwave Junction Is Required ?
ØSometime it is necessary to split all or part of microwave energy into particular direction OR to combine two or more signal.
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E-plane tee(series tee)
Port 3 Side arm Port 2
Collinear arms Port 1
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What is E-plane Tee?
ØAn E-plane tee is a waveguide tee in which the axis of its side arm is parallel to the E field of the main guide.
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IN
SIDE ARM
OUTPUT AT 180 DEGREE PHASE SHIFT
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OUT
SIDE ARM
FIELD PATTERN OF E-PLANE