Abstract
Characteristics of a class of microstrip resonators which are loaded with dielectric rods, are investigated by a finite-difference time-domain (FDTD) method. Dielectric rods to be inserted between a strip conductor and the ground plane have higher relative permittivity than that of the substrate. When a basic half-wavelength (λ/2) microstrip resonator is loaded with two dielectric rods, the electric length of a loaded half-wavelength (λ/2) resonator becomes longer than λ/2, which makes its fundamental resonant frequency (f′r) to be generated on the region lower than that of an unloaded λ/2 resonator (fr) and its first spurious response fsp1 is generated on the region higher than 2f′r. Therefore, to shift f′r back to fr, the resonator's length is to be reduced, and this, in turns, suppresses the spurious responses. A tapped resonator employing the proposed method is capable of realising the improved spurious responses together with an attenuation pole in the stopband, and of reducing the resonator's length as well. A resonator employing the presented method is fabricated using low-temperature cofired ceramic (LTCC) materials, and the analysis is verified by comparing the computed results with the measurement.
| Original language | English |
|---|---|
| Pages (from-to) | 341-346 |
| Number of pages | 6 |
| Journal | IEE Proceedings: Microwaves, Antennas and Propagation |
| Volume | 153 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Aug 1 2006 |
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All Science Journal Classification (ASJC) codes
- Computer Networks and Communications
- Electrical and Electronic Engineering
Cite this
Fundamental characteristics of microstrip resonators loaded with dielectric rods for suppression of spurious responses. / Pokharel, Ramesh; Wada, K.; Hashimoto, O.; Takahashi, T.
In: IEE Proceedings: Microwaves, Antennas and Propagation, Vol. 153, No. 4, 01.08.2006, p. 341-346.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Fundamental characteristics of microstrip resonators loaded with dielectric rods for suppression of spurious responses
AU - Pokharel, Ramesh
AU - Wada, K.
AU - Hashimoto, O.
AU - Takahashi, T.
PY - 2006/8/1
Y1 - 2006/8/1
N2 - Characteristics of a class of microstrip resonators which are loaded with dielectric rods, are investigated by a finite-difference time-domain (FDTD) method. Dielectric rods to be inserted between a strip conductor and the ground plane have higher relative permittivity than that of the substrate. When a basic half-wavelength (λ/2) microstrip resonator is loaded with two dielectric rods, the electric length of a loaded half-wavelength (λ/2) resonator becomes longer than λ/2, which makes its fundamental resonant frequency (f′r) to be generated on the region lower than that of an unloaded λ/2 resonator (fr) and its first spurious response fsp1 is generated on the region higher than 2f′r. Therefore, to shift f′r back to fr, the resonator's length is to be reduced, and this, in turns, suppresses the spurious responses. A tapped resonator employing the proposed method is capable of realising the improved spurious responses together with an attenuation pole in the stopband, and of reducing the resonator's length as well. A resonator employing the presented method is fabricated using low-temperature cofired ceramic (LTCC) materials, and the analysis is verified by comparing the computed results with the measurement.
AB - Characteristics of a class of microstrip resonators which are loaded with dielectric rods, are investigated by a finite-difference time-domain (FDTD) method. Dielectric rods to be inserted between a strip conductor and the ground plane have higher relative permittivity than that of the substrate. When a basic half-wavelength (λ/2) microstrip resonator is loaded with two dielectric rods, the electric length of a loaded half-wavelength (λ/2) resonator becomes longer than λ/2, which makes its fundamental resonant frequency (f′r) to be generated on the region lower than that of an unloaded λ/2 resonator (fr) and its first spurious response fsp1 is generated on the region higher than 2f′r. Therefore, to shift f′r back to fr, the resonator's length is to be reduced, and this, in turns, suppresses the spurious responses. A tapped resonator employing the proposed method is capable of realising the improved spurious responses together with an attenuation pole in the stopband, and of reducing the resonator's length as well. A resonator employing the presented method is fabricated using low-temperature cofired ceramic (LTCC) materials, and the analysis is verified by comparing the computed results with the measurement.
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UR - http://www.scopus.com/inward/citedby.url?scp=33747116398&partnerID=8YFLogxK
U2 - 10.1049/ip-map:20050215
DO - 10.1049/ip-map:20050215
M3 - Article
AN - SCOPUS:33747116398
VL - 153
SP - 341
EP - 346
JO - IEE Proceedings: Microwaves, Antennas and Propagation
JF - IEE Proceedings: Microwaves, Antennas and Propagation
SN - 1350-2417
IS - 4
ER -