Quarter-Wave Stub

quarter-wave stub

[′kwȯrd·ər ‚wāv ¦stəb]
(electromagnetism)
A section of transmission line that is one quarter-wavelength long at the fundamental frequency being transmitted; when shorted at the far end, it has a high impedance at the fundamental frequency and all odd harmonics, and a low impedance for all even harmonics. Also known as quarter-wave line; quarter-wave transmission line.

Quarter-Wave Stub

 

(also quarter-wave line), a section of a microwave transmission line that is a quarter-wavelength long at the fundamental frequency being transmitted. The input impedance of a quarter-wave stub is inversely proportional to its load impedance. This property of quarter-wave stubs makes it possible to use such stubs in many microwave devices, such as quarter-wave transformers and antenna switches.

References in periodicals archive ?
They use quarter-wave stub technology and are suitable for outdoor cable entry or antenna leads for telecommunications, wireless and commercial bands such as 3G, PCS, GSM, TETRA, UMTS and 802.
The lines to the right of points b-b' realize a simple, open-circuited quarter-wave stub.
Mumford, "Tables of Stub Admittances for Maximally Flat Filters Using Shorted Quarter-wave Stubs," IEEE Transactions on Microwave Theory and Techniques, Vol.