Hostname: page-component-77c89778f8-9q27g Total loading time: 0 Render date: 2024-07-20T12:34:48.159Z Has data issue: false hasContentIssue false
  • English
  • Français

Ultra-low-loss high-pass filter with air-core short-circuit coaxial cable

Published online by Cambridge University Press:  05 July 2017

Hongfei Liu  and
Sander Weinreb
Hongfei Liu*
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences (CAS), Beijing 100012, China Key Laboratory of Radio Astronomy, Chinese Academy of Science (CAS), Nanjing 210008, China
Sander Weinreb
Affiliation:
California Institute of Technology, Pasadena, CA 91125, USA
*
Corresponding author: H. Liu Email: lhf@bao.ac.cn
Get access Rights & Permissions [Opens in a new window]

Abstract

This paper presents a novel ultra-low-loss high-pass filter with 3 dB cutoff frequency of 890 MHz for astronomical receiver radio frequency interference mitigation application. The filter consists of three series capacitors, four shunt inductors, and microstrip circuit board. Specially, 4 shunt inductors are actualized by fabricating air-core short-circuit coaxial cable inductors in the filter box body, and the quality factor of these cable inductors is up to 762.2 and 1046, respectively, at 1.4 GHz. In the expected passband of 1.1–1.9 GHz, S parameters measurement show that insertion loss is lower than 0.16 dB and two-port return loss is larger than 20 dB; noise measurement show that filter noise temperature is lower than 8 at 300 K ambient temperature. Noise sources of this filter are analyzed by simulation and measurement.

Keywords

High-pass filterUltra-low lossShort-circuit coaxial inductor
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 9 , Issue 9 , November 2017 , pp. 1817 - 1820
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2017 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1] Yu, T. et al. : A wideband superconducting filter using strong coupling resonators for radio astronomy observatory. IEEE Trans. Microw. Theory Tech., 57 (7) (2009), 1783–1789.Google Scholar
[2] Li, Y.Z. et al. : Superconducting microstrip wide band filter for radio astronomy, in IEEE MTT-S Digest, 2003, 551–553.Google Scholar
[3] Zhang, G.Y. et al. : Accurate design of high tc superconducting microstrip filter at UHF band for radio astronomy front end, in IEEE MTT-S Digest, 2004, 341–344.Google Scholar
[4]Reference Data for Radio Engineer, Howard w. Sams & CO., INC., 1976.Google Scholar
[5]Microwave Office 2010, AWR Corporation, EI Segundo, CA 92045, USA, 2010.Google Scholar
[6]Datasheet of Coilcraft Chip Inductors 0603HP Series, 2012, www.coilcraft.com.Google Scholar
[7] Weinreb, S.: Microwave Circuits, Devices and Systems, EE787, Department of Electrical Engineering School of Engineering and Applied Science, University of Virginia, 1987. http://resolver.caltech.edu.Google Scholar