Shaping and Slotting High-Q Spherical Resonators for Suppression of Higher Order Modes

Guo，Cheng1,2; Li，Jin3; Yu，Yang2,4; Zhang，Fan2,5; Li，Sheng6; Attallah，Moataz M.6; Shang，Xiaobang7; Zhang，Anxue1; Wang，Yi2; Lancaster，Michael J.2

10.1109/MWSYM.2019.8700752

2019-06-01

0149-645X

2576-7216

978-1-7281-1310-4

IEEE MTT-S International Microwave Symposium Digest

2019-June

1205-1208

2-7 June 2019

Boston, MA, United states

345 E 47TH ST, NEW YORK, NY 10017 USA

IEEE

This paper proposes two methods to improve the spurious-free stopband range for high-quality-factor spherical resonators and a new family of shaped spherical resonators are presented. Geometrical shaping of the proposed resonators is realized by symmetrically squeezing a spherical cavity and further opening a rectangular slot in each squeezed area. The higher order modes of the resonator are first tuned spectrally farther away from the dominant mode by the squeezing, and then are suppressed by the slotting. X-band resonator prototypes are designed, and 3-D printed by using a metallic selective laser melting technique. Quality factors of the fabricated resonators are further improved by vibration grinding process. The experiment validates effective suppression of the first higher order mode and indicates potential applications of the proposed resonators in bandpass filters to extend the spurious-free stopband bandwidths.

Additive manufacturing high quality factor higher order mode suppression selective laser melting shaped spherical resonator slotted cavity resonator

其他

英语

CPCI-S ; EI

Engineering ; Telecommunications

Engineering, Electrical & Electronic ; Telecommunications

WOS:000494461700312

20193107262944

3D printers ; Bandpass filters ; Melting ; Slotting ; Spheres

Metal Cutting:604.1 ; Electric Filters:703.2 ; Printing Equipment:745.1.1 ; Chemical Operations:802.3

2-s2.0-85069959937

Scopus

1.Dept. of Inf and Communication EngineeringXi'An Jiaotong University,Xi'an, Shanxi,710049,China
2.Dept. of EESEUniversity of Birmingham,Edgbaston, Birmingham,B15 2TT,United Kingdom
3.College of Information EngineeringShenzhen University,Shenzhen, Guangdong,518060,China
4.Dept. of EE EngineeringSouthern University of Science and Technology,Shenzhen,China
5.School of PhysicsUESTC,Chengdu, Sichuan,610054,China
6.School of Metallurgy and MaterialsUniversity of Birmingham,Edgbaston, Birmingham,B15 2TT,United Kingdom
7.National Physical Laboratory,Teddington-Middlesex,TW11 0LW,United Kingdom

Guo，Cheng,Li，Jin,Yu，Yang,et al. Shaping and Slotting High-Q Spherical Resonators for Suppression of Higher Order Modes[C]. 345 E 47TH ST, NEW YORK, NY 10017 USA:IEEE,2019:1205-1208.