Referenced Items are not available for this document.
The application of step-impedance transmission lines (SITLs) to improving the directivity of parallel-coupled microstrip lines is presented. A simple design procedure for two configurations based on the SITL technique is given. The application of the technique is demonstrated practically with a design at 0.9 GHz on an RF60 substrate. The directivities obtained from the measured results are improved by more than 6 and 30 dB compared with the designed uncompensated coupler. The compensation technique is then applied to the design of a coupled-line resonator and bandpass filter for suppressing harmonic responses in these circuits. Experimental results show that the second harmonic in the filter response is suppressed by 30 dB.
Published in:
Microwaves, Antennas & Propagation, IET
(Volume:3
,
Issue:
3
)
Date of Publication: April 2009
- Page(s):
- 410 - 415
- ISSN :
- 1751-8725
- INSPEC Accession Number:
- 10613389
- Digital Object Identifier :
- 10.1049/iet-map.2008.0070
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 27 March 2009
- Issue Date :
- April 2009
- Sponsored by :
- Institution of Engineering and Technology
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