DUAL MODE-COUPLING BY SQUARE CORNER CUT IN RESONATORS AND FILTERS

被引：104
作者：
LIANG, XP [1 ]
ZAKI, KA [1 ]
ATIA, AE [1 ]
机构：
[1] COMSAT LABS,DIV SYST,CLARKSBURG,MD 20871
来源：
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 1992年 / 40卷 / 12期
关键词：
D O I：
10.1109/22.179893
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A new method for realization of dual mode coupling in rectangular waveguide cavities is described and analyzed. The method completely replaces the coupling screw, and therefore can be used to eliminate the need for tuning in dual mode waveguide cavity filters. It also offers a wide range of coupling values and can achieve higher power handling capability than coupling screws. Mode matching method is used to calculate the mode chart of the infinitely long square corner cut rectangular waveguide (SCCRW), the field distributions of each mode, and the resonant frequencies of the cavity. Evanescent mode rectangular waveguide is used to provide dual mode couplings between adjacent cavities. The junction discontinuity between the SCCRW and the rectangular waveguide is modeled by double mode matching method, obtaining modal scattering parameters of the junction. A 4-pole dual mode elliptic function rectangular waveguide cavity filter using the new coupling method was constructed. The natural frequencies of the whole filter structure is calculated and is verified by measurements. The experimental filter results showed excellent agreement with theory.
引用
收藏
页码：2294 / 2302
页数：9
相关论文
共 11 条
[1]  
Atia A., 1971, COMSAT TECH REV, V1, P20
[2]   NARROW-BANDPASS WAVEGUIDE FILTERS [J].
ATIA, AE ;
WILLIAMS, AE .
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 1972, MT20 (04) :258-&
[3]   EVANESCENT-MODE COUPLING OF DUAL-MODE RECTANGULAR WAVE-GUIDE FILTERS [J].
CHANG, HC ;
ZAKI, KA .
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 1991, 39 (08) :1307-1312
[4]   A NOVEL COUPLING METHOD FOR DUAL-MODE DIELECTRIC RESONATORS AND WAVE-GUIDE FILTERS [J].
CHEN, SW ;
ZAKI, KA .
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 1990, 38 (12) :1885-1893
[5]  
COLLIN RE, 1960, FIELD THEORY GUIDED, P171
[6]  
CURTIS JA, 1991 IEE MTT S INT M, V2, P443
[7]   DUAL-MODE DIELECTRIC RESONATOR LOADED CAVITY FILTERS [J].
FIEDZIUSZKO, SJ .
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 1982, 30 (09) :1311-1316
[8]   NOVEL DIELECTRIC WAVE-GUIDE COMPONENTS - MICROWAVE APPLICATIONS OF NEW CERAMIC MATERIALS [J].
KONISHI, Y .
PROCEEDINGS OF THE IEEE, 1991, 79 (06) :726-740
[9]  
MATTHAEI G, 1964, MICROWAVE FILTERS IM, P434
[10]   TRANSMISSION MATRIX REPRESENTATION OF FINLINE DISCONTINUITIES [J].
OMAR, AS ;
SCHUNEMANN, K .
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 1985, 33 (09) :765-770
12