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Branch Line Coupler: Hanyang University

The document discusses a branch line coupler which is a four-port network device with a 90 degree phase difference between two coupled ports. It can be used for single antenna transmit/receive systems or I/Q signal splitting/combining. Diagrams show the design of a microstrip branch line coupler including dimensions. Low-pass filters are also discussed as well as equations for microstrip patch antenna ground and patch dimensions and diagrams of an antenna design and reflection coefficient and radiation pattern.

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SaifulIslam
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120 views7 pages

Branch Line Coupler: Hanyang University

The document discusses a branch line coupler which is a four-port network device with a 90 degree phase difference between two coupled ports. It can be used for single antenna transmit/receive systems or I/Q signal splitting/combining. Diagrams show the design of a microstrip branch line coupler including dimensions. Low-pass filters are also discussed as well as equations for microstrip patch antenna ground and patch dimensions and diagrams of an antenna design and reflection coefficient and radiation pattern.

Uploaded by

SaifulIslam
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PPTX, PDF, TXT or read online on Scribd
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Branch Line Coupler

A Branch Line Coupler (Quadrature 90° Hybrid) is a four-port network device with


a 90° phase difference between two coupled ports. The device can be used for a single
antenna Transmitter/Receiver system or an I/Q signal splitter/combiner.

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Hanyang University
Branch Line Coupler
9.75 mm

Substrate
23.6 mm 7.34 mm 5.79 mm

7.34 mm Copper
2.41 mm
0.77 mm

22 mm

Fig: Microstrip Branch line Coupler

Fig: Reflection Coefficient


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Hanyang University
Low Pass Filter
A low-pass filter is a filter that passes signals with a frequency lower than a
selected cutoff frequency and attenuates signals with frequencies higher than the
cutoff frequency. The exact frequency response of the filter depends on the filter
design.

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Microstrip Patch Antenna

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Microstrip Patch Antenna
Equation For Ground Dimensions Equation For Patch Dimensions

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Microstrip Patch Antenna
Substrate

6 mm 2.7 mm
Copper

3 mm
6 mm
Fig: Antenna

Fig: Reflection Coefficient


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Microstrip Patch Antenna

Fig: Radiation Pattern

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