Dual‐band design of single‐stub impedance matching networks with application to dual‐band stubbed T‐junctions

Abstract

A new design method of single‐stub impedance matching networks is presented for the dual‐band application. The dual‐band operating conditions are analyzed in detail and the design equations are derived in concise form for different locations and termination types of the stub line. The proposed impedance matching scheme is successfully applied to the design of a stubbed dual‐band T‐junction power divider. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1359–1362, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25201

A DUAL-FREQUENCY MATCHING NETWORK FOR FDCLS USING DUAL-BAND Λ/4-Lines

“…Thus, many dual-frequency matching networks have been reported. For instance, real load impedance to real source impedance dual frequency transformer was reported in [2], Chebyshev impedance transformer was reported in [3], an L-type transformer was reported in [4], and an impedance transformer with a DC block property was presented in [5].…”

A Tri-Band Impedance Transformer Using Stubbed Coupling Line

“…Impedance transformers are one of the important components applied in microwave and millimeter-wave circuits, such as microwave amplifiers, power dividers, mixers, the feeding networks for a smart antenna array [1][2][3][4][5][6][7][8][9][10][11][12]. The quarter-wavelength transmission line (TL) is a conventional basic impedance transformer designed to operate at a single band.…”

“…Then Monzon analyzed and derived its close-form solutions [8], and further proposed a small twosection dual-frequency transformer working at any two uncorrelated frequencies on purely real impedance transformation [9]. An Ltype impedance transformer is also developed for the same purpose in [10]. The meaningful improvements have been reported in [11], and [12], extending the impedance transformer for complex load at the third harmonics' frequency or independent frequencies.…”

Lumped Dual-Frequency Impedance Transformers for Frequency-Dependent Complex Loads

“…Recently as dual-band microwave components are becoming a trend [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16], the demand for dual-frequency impedance transformers has been increasing. Dual-frequency impedance matching were firstly realized between real impedances [17,18]. In [17] two sections of transmission line of same length are cascaded to realize a dual-frequency transformer between real impedance load and real impedance source.…”

“…In [17] two sections of transmission line of same length are cascaded to realize a dual-frequency transformer between real impedance load and real impedance source. L-shaped network containing a transmission line and a shunt stub can also realize the same function [18]. As it is usually demanded to realize impedance matching from complex loads (such as the input or output impedance of a power amplifier) to a real-impedance source new techniques are proposed [19][20][21][22].…”