Dual‐mode dual‐band bandpass filter design using open‐loop resonators

Liu, Haiwen; Zhao, Yulong; Shi, Liyun; Luo, Hui

doi:10.1002/mop.27080

Cited by 8 publications

(9 citation statements)

References 8 publications

(5 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2 Also, dual-band bandpass filters can be realized by using multi-mode resonators, such as a meander-loop resonator, 3 stepped impedance resonators (SIRs), 4 and microstrip open-loop resonators. 5 In recent years, composite right/lefthanded (CRLH) transmission lines (TLs), which have a unique phase response, have been widely used to design multi-band microwave circuits. [6][7][8] However, conventional CRLH TLs used a phase response of 2/ and 23/ at 2 frequency bands, which resulted in a large circuit size.…”

Section: Introductionmentioning

confidence: 99%

Size reduction of composite right/left handed transmission line and its application to the design of dual-band bandpass filter

Chaudhary

Jeong

2017

Microw. Opt. Technol. Lett.

View full text Add to dashboard Cite

20] Byambaakhuu B, et al. Development of small-sized UWB antenna for binaural hearing AIDS. Microwave Opt Technol Lett. 2015;57(8):1883-1889. [21] Tofighi, Mohmmad-Reza. "Characterization of biomedical antennas for microwave heating, radiometry, and implant communication applications. In: "IEEE 12th Annual Wireless and Microwave Technology Conference (WAMICON), 2011 [22] Klemetsen Ø, Jacobsen S. Improved radiometric performance attained by an elliptical microwave antenna with suction. IEEE Trans Biomed Eng. 2012;59(1):263-271. How to cite this article: Byambaakhuu B, Nyamsuren P, Park R-, Cheon C. Monostatic radiometry system for temperature measurement during RF hyperthermia treatment. Microw Opt AbstractThis article presents a method that chooses appropriate phase size to reduce the size of a composite right/lefthanded (CRLH) transmission line. A reduced-size dualband bandpass filter was designed and fabricated to demonstrate the proposed CRLH line, and the wide dualpassband characteristics are obtained by implementing a dual-band J-inverter as the coupling between 2 CRLHresonators. A defected ground structure is adopted to obtain the line with a high characteristic impedance for the J-inverter. The designed dual-wideband bandpass is validated by conducting experiments and obtaining measures of its performance. The results show that the 2 passbands are centered at 2.4 GHz and 5.2 GHz, with a 3-dB fractional bandwidth of 33.75% and 38.46%, respectively. In addition, this filter has low insertion losses of 0.21 dB and 0.5 dB for each passband. K E Y W O R D S defected ground structure, dual-band J-inverter, dual wide bandwidth, reduced composite right/left-handed transmission line

show abstract

Section: Introductionmentioning

confidence: 99%

Size reduction of composite right/left handed transmission line and its application to the design of dual-band bandpass filter

Chaudhary

Jeong

2017

Microw. Opt. Technol. Lett.

View full text Add to dashboard Cite

show abstract

“…The dual‐mode BPFs are attractive because each resonator can be tuned independently, and the number of resonators for a given degree of filter is reduced by half, resulting in a reduced size. By combining multiple T‐shape stub‐loaded resonators (TSSLRs) together , dual‐mode multiband BPFs can be designed. However, they usually suffer from a large insertion loss.…”

Section: Introductionmentioning

confidence: 99%

Compact and highly selective dual/tri‐band BPFs using folded T‐shaped stub‐loaded resonators for WLAN and WiMAX applications

Liang

Kim

2015

Micro & Optical Tech Letters

View full text Add to dashboard Cite

In this article, a series of dual‐/tri‐band bandpass filters (BPFs) using folded T‐shaped stub‐loaded resonators (TSSLRs) are presented for WLAN and WiMAX applications. The proposed TSSLR is constructed using two λ/4 resonators and a T‐shaped folded stub. A controllable transmission zero will be generated at the desired transition band leading to sharp roll‐off skirts and excellent out‐of‐band suppression by adjusting the length of the folded stub. After combining two or three TSSLRs with flexible feed‐lines, very compact overall sizes of 0.29 λg × 0.16 λg, 0.30 λg × 0.22 λg for dual‐band BPFs and 0.28 λg × 0.19 λg, 0.30 λg × 0.22 λg for tri‐band BPFs can be obtained. The measured results of the two dual‐band BPFs (I and II) show excellent characteristics of low insertion loss of 1.2/0.87 and 0.7/0.77 dB and wide fractional bandwidth (FBW) of 15.3%/24.2% and 28.7%/16.3%, respectively. Insertion losses of the tri‐band BPFs (III and IV) based on simulation results are approximately 0.2 dB and FBWs range from 10.34% to 15.02%, which prove excellent performance and further verify the design method. Furthermore, ultra‐high roll‐off factors of 54 dB and 67.5 dB per 100 MHz have been achieved in simulation results of the tri‐band BPF IV's 1st and 2nd up transition bands, respectively. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:312–319, 2016

show abstract

“…Stepped‐impedance resonators (SIRs) are popularly used in dual‐band filters for its easy control of second passband . The other method is to adopt a dual‐mode and multiple‐mode resonator cell with controllable resonant frequencies to design the dual‐band filter, such as stub‐loaded resonators and ring resonators . Dual‐passband is realized using only one resonator and the central frequencies and bandwidth of the filter can be controlled.…”

Section: Introductionmentioning

confidence: 99%

Compact dual‐mode dual‐band bandpass filter using slotted stepped‐impedance resonator

Song

Guan

Zhang

2014

Micro & Optical Tech Letters

View full text Add to dashboard Cite

A compact dual‐mode dual‐band bandpass filter (BPF) is proposed in this article. A T‐shaped slot is etched on the center of the low‐impedance part of a stepped‐impedance resonator, which mainly impact on the pairs of high‐order modes of the resonator. By tuning the length and width of the slot, both pairs of dual‐modes the resonator can be controlled, implying that the bandwidth of the filter can be controlled. The feed line is folded to fulfill the external coupling of the dual‐passband. A dual‐band BPF for 2.4 and 3.5 GHz application is designed, fabricated, and measured. Agreements between measured results and the simulated results verify the proposed structure. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1057–1060, 2014

show abstract

Dual‐mode dual‐band bandpass filter design using open‐loop resonators

Cited by 8 publications

References 8 publications

Size reduction of composite right/left handed transmission line and its application to the design of dual-band bandpass filter

Size reduction of composite right/left handed transmission line and its application to the design of dual-band bandpass filter

Compact and highly selective dual/tri‐band BPFs using folded T‐shaped stub‐loaded resonators for WLAN and WiMAX applications

Compact dual‐mode dual‐band bandpass filter using slotted stepped‐impedance resonator

Contact Info

Product

Resources

About