A Simple Method to Design a Compact and High Performance Dual-Band Bandpass Filter for GSM and Wlan

Hung, Cheng-Yuan; Yang, Ru‐Yuan; Lin, and Yueh-Ling

doi:10.2528/pierc10040902

Cited by 13 publications

(6 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…; (1) where N refers to the number of CRLH unit cells. In the case of conventional RH TLs, the second passband center frequency is determined to be 3 times the first passband center frequency (f 2 5 3f 1 ).…”

Section: E S I G N E Q U a T I O Nmentioning

confidence: 99%

“…However, the circuit size would increase when this method was used. 1 Similarly, 2-step frequency transformations had been applied to a low pass prototype to design dual-band filters. 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.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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: E S I G N E Q U a T I O Nmentioning

confidence: 99%

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

“…Therefore, the pursuit of a DB‐BPF with good‐performances has become a key trend in the field of research. A variety of design techniques is frequently used for DB‐BPF design such as square loop dual mode resonator, defected ground structure (DGS), spiral resonators, defected stepped impedance resonator (Defected‐SIR), slotted stepped impedance resonator (Slotted‐SIR), multilayer stepped impedance resonator (Multilayer‐SIR), meandering stepped impedance resonators (Meandering‐SIR), stub‐loaded stepped impedance resonator (Stub‐loaded SIR), and coupled stepped impedance resonator (Coupled‐SIR) . However, the DB‐BPFs proposed by still possess a complex geometry and achieve a narrow bandwidth.…”

Section: Introductionmentioning

confidence: 99%

Dual‐wideband band pass filter using folded cross‐stub stepped impedance resonator

Praptodinoyo

Wiryadinata

Suhendar

et al. 2017

Micro & Optical Tech Letters

View full text Add to dashboard Cite

In this letter, a dual‐wideband band pass filter (DW‐BPF) using cross‐stub stepped impedance resonator (CS‐SIR) was simulated, fabricated, and measured accordingly. The CS‐SIR was used to replace the conventional half‐wavelength open stub resonators. Compare to the conventional resonator, the CS‐SIR resonator has a wider fractional bandwidth and ease of fabrication. Furthermore, the DB‐BPF was fabricated on microstrip with ɛr = 4.4, h = 0.8 mm, and tan δ = 0.0265. The DW‐BPF with CS‐SIR achieves transmission‐coefficients/fractional‐bandwidth of 0.22 dB/94.19% and 1.87 dB/33.52% at 1.14 GHz and 2.31 GHz, respectively. In order to reduce the filter size, a folded CS‐SIR (FCS‐SIR) was also proposed. As a result, this BPF size was reduced to 53%, with the BPF size of 0.30 λG2 and 0.14 λG2 for DW‐BPF with CS‐SIR and DW‐BPF with folded CS‐SIR, respectively. The λG is the wavelength at the first frequency. Further, the DW‐BPF with FCS‐SIR achieves transmission coefficients/fractional bandwidth of 0.19 dB/89.08% and 1.29 dB/31.90% at 1.21 GHz and 2.41 GHz, respectively. Measured results are in a very good agreement with the simulated results.

show abstract

“…Since the characteristic polynomial defines the response of the overall filter design, by altering the characteristic polynomials, the dual-band response can be solved at the grassroots level, i.e., in the lowpass prototype (LPP) itself, allowing classical approaches for single-band to be utilized. In comparison to many 'dual-diplex' approaches [3,[7][8][9][10], there is also no need for impedance matching circuit which is a common issue found in cascading networks. Compared to design techniques such as the cascaded formation of two prototypes [11] to form a dual-band filter, the presented methods in this paper provide more analytical flexibility over the designing process.…”

Section: Introductionmentioning

confidence: 99%

Design and Synthesis of Dual-Band Microwave Bandpass Filter Based on Hybrid Polynomials

Pheng¹,

Wong²

2017

PIER C

View full text Add to dashboard Cite

Abstract-This paper presents a method of designing a bandpass filter using hybrid polynomials. Two different approaches are discussed in this paper. The first method uses class hybridization of a lowpass Chebyshev and highpass maximally flat to achieve the hybrid filtering function (HFF). The second method employs both Chebyshev polynomials of the first and second kinds to form a modified Chebyshev polynomial. Both methods achieve a narrowband dual-band lowpass prototype (DBLPP) without much deviation from classical methods of synthesis. The designs can be adapted into a modified interdigital prototype which will be shown in this paper. The results and measurements reflect a good adherence to the theoretical calculations.

show abstract

A Simple Method to Design a Compact and High Performance Dual-Band Bandpass Filter for GSM and Wlan

Cited by 13 publications

References 7 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

Dual‐wideband band pass filter using folded cross‐stub stepped impedance resonator

Design and Synthesis of Dual-Band Microwave Bandpass Filter Based on Hybrid Polynomials

Contact Info

Product

Resources

About