Abstract
This paper presents a new bandwidth tuning theory for Butterworth-response resonator filters. The presented theory shows that the bandwidth of odd-order Butterworth filters can be varied by adjusting only two interresonator coupling structures while maintaining a perfect impedance matching at the center frequency. In other words, this paper presents an analytic approach to reduce the number of tunable coupling structures when designing a bandwidth-tunable resonator filter. Theories for third- A nd fifth-order direct-coupled filters are discussed in detail, and it is shown that only two interresonator coupling structures are required to be tunable. In addition, for verifying the new bandwidth tuning method, a fifth-order cylindrical cavity filter has been designed, fabricated, and measured. The fabricated filter has an 11:1 bandwidth tuning range.
| Original language | English |
|---|---|
| Article number | 8653495 |
| Pages (from-to) | 1496-1503 |
| Number of pages | 8 |
| Journal | IEEE Transactions on Microwave Theory and Techniques |
| Volume | 67 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2019 Apr 1 |
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Keywords
- Bandwidth tuning
- cavity resonator
- interresonator coupling
- topology
ASJC Scopus subject areas
- Radiation
- Condensed Matter Physics
- Electrical and Electronic Engineering
Cite this
Bandwidth tuning of resonator filter using reduced number of tunable coupling structures. / Lee, Boyoung; Nam, Seunggoo; Lee, Ju Seop.
In: IEEE Transactions on Microwave Theory and Techniques, Vol. 67, No. 4, 8653495, 01.04.2019, p. 1496-1503.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Bandwidth tuning of resonator filter using reduced number of tunable coupling structures
AU - Lee, Boyoung
AU - Nam, Seunggoo
AU - Lee, Ju Seop
PY - 2019/4/1
Y1 - 2019/4/1
N2 - This paper presents a new bandwidth tuning theory for Butterworth-response resonator filters. The presented theory shows that the bandwidth of odd-order Butterworth filters can be varied by adjusting only two interresonator coupling structures while maintaining a perfect impedance matching at the center frequency. In other words, this paper presents an analytic approach to reduce the number of tunable coupling structures when designing a bandwidth-tunable resonator filter. Theories for third- A nd fifth-order direct-coupled filters are discussed in detail, and it is shown that only two interresonator coupling structures are required to be tunable. In addition, for verifying the new bandwidth tuning method, a fifth-order cylindrical cavity filter has been designed, fabricated, and measured. The fabricated filter has an 11:1 bandwidth tuning range.
AB - This paper presents a new bandwidth tuning theory for Butterworth-response resonator filters. The presented theory shows that the bandwidth of odd-order Butterworth filters can be varied by adjusting only two interresonator coupling structures while maintaining a perfect impedance matching at the center frequency. In other words, this paper presents an analytic approach to reduce the number of tunable coupling structures when designing a bandwidth-tunable resonator filter. Theories for third- A nd fifth-order direct-coupled filters are discussed in detail, and it is shown that only two interresonator coupling structures are required to be tunable. In addition, for verifying the new bandwidth tuning method, a fifth-order cylindrical cavity filter has been designed, fabricated, and measured. The fabricated filter has an 11:1 bandwidth tuning range.
KW - Bandwidth tuning
KW - cavity resonator
KW - interresonator coupling
KW - topology
UR - http://www.scopus.com/inward/record.url?scp=85064076996&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85064076996&partnerID=8YFLogxK
U2 - 10.1109/TMTT.2019.2898860
DO - 10.1109/TMTT.2019.2898860
M3 - Article
AN - SCOPUS:85064076996
VL - 67
SP - 1496
EP - 1503
JO - IEEE Transactions on Microwave Theory and Techniques
JF - IEEE Transactions on Microwave Theory and Techniques
SN - 0018-9480
IS - 4
M1 - 8653495
ER -