Compact Superconducting Diplexer Design With Conductor-Backed Coplanar Waveguide Structures

Zheng, Tianning; Wei, Bin; Cao, Bisong; Guo, Xubo; Zhang, Xiaoping; Jiang, Linan; Xu, Zhan; Heng, Yong

doi:10.1109/tasc.2015.2409204

Cited by 22 publications

(6 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is a passive filtering device for radio frequencies with two channels; each one implements a filtering of frequencies without overlapping of the pass-bands. In the literature, there are lot of approaches reported to design a several type of diplexers such as dielectric resonator cavity [1,2], slot line [3], coplanar [4], coaxial [5], waveguide cavity [6][7][8], and planar structures [9][10][11][12][13]. The major challenges during the design of diplexers are the small size, low loss, the wide stopband and high selectivity.…”

Section: Introductionmentioning

confidence: 99%

A miniaturized high isolation printed diplexer model based on band pass filter technique for 4G-LTE/5G-Sub 6 GHz applications

Slimani

Das²,

Madhav³

et al. 2022

J. Inst.

View full text Add to dashboard Cite

This paper presents the design of a high isolation miniaturized compact diplexer model based on Band-Pass Filter technique, which is intended especially for a lower band [1.7 GHz to 1.9 GHz] fixed for 4G-LTE and a higher band [3.4 GHz to 3.8 GHz] fixed for 5G Sub-6 GHz. The designed diplexer is very compact with an overall size of 11× 36.49 mm2. The proposed design method is implemented by directly combining two band pass filters (BPFs) with separated electric and magnetic coupling distribution and designed with planar structures on a Rogers RT/duroid 6010LM substrate with a relative dielectric constant of 10.2, which simplifies significantly the design process of diplexer. The performance of this structure is presented and discussed in terms of its important characteristics: Impedance matching, Transmission losses and Isolation. Good agreements between simulated and measured results are achieved, which successfully verifies the proposed design method.

show abstract

Section: Introductionmentioning

confidence: 99%

A miniaturized high isolation printed diplexer model based on band pass filter technique for 4G-LTE/5G-Sub 6 GHz applications

Slimani

Das²,

Madhav³

et al. 2022

J. Inst.

View full text Add to dashboard Cite

show abstract

“…With the stringent requirements in modern communication systems, it is demanded that they have small size, low loss, high isolation, flexible channel frequencies, and so on. Therefore, various kinds of diplexers/multiplexers have been developed for modern transceivers, such as substrate integrated waveguide (SIW) [1–3], cavity [4–7], slotline [8, 9], coplanar waveguide structure [10], and microstrip [11–24].…”

Section: Introductionmentioning

confidence: 99%

Separately-designable diplexer with multiple transmission zeroes using common stub-loaded SIR

Zhang

Cai

Chen

2020

Int. J. Microw. Wireless Technol.

View full text Add to dashboard Cite

A separately-designable diplexer with multiple transmission zeroes (TZs) using common stub-loaded stepped impedance resonator (SIR) is proposed. The common stub-loaded SIR operating in third harmonic (f3) and fifth harmonic (f5) is used for designing the two diplexer channels. The stub is loaded at the voltage-null point of f3 of the SIR. It can separately control f5 but has no effect on f3 so that the two channels can be separately designed. Meanwhile, the input port is tap-connected to the common stub-loaded SIR, which necessarily produces a TZ between f3 and f5, existing in both channel filtering responses. By properly choosing coupling schemes of the two channels, more TZs are realized at the desired locations. Thanks to the generation of the multiple TZs, both passband selectivity and isolation between the two channels are improved significantly. For demonstration, a diplexer operating at 2.22 and 2.95 GHz is designed, fabricated, and measured. The simulated and measured results are presented, showing good agreement.

show abstract

“…Diplexers with multiple transmission zeros (TZs) and high isolation level are highly demanded in the modern wireless communication systems. Several advanced resonators such as slotlineloaded microstrip ring resonators [1], simple coupled line resonators [2], short stub-loaded composite right/left-handed resonators [3], defected ground resonators [4], [5], cavity resonators [6], [7], and coplanar waveguide resonators [8], [9] are successfully employed in bandpass filters (BPFs). The matching networks in diplexers ensure that BPFs match well in their working frequencies.…”

Section: Introductionmentioning

confidence: 99%

A Novel Design Method for High Isolated Microstrip Diplexers Without Extra Matching Circuit

et al. 2019

View full text Add to dashboard Cite

A novel design method of microstrip diplexer without extra matching circuit is proposed in this paper. Because of the synthesizable circuit parameters and controllable transmission zeros (TZs) in composite resonator (CR) cell, diplexer A based on CR cell is proposed. By allocating TZs at center frequency of the opposite channel, as well as the using of impedance transformations of J-inverters, high isolation and good passband selectivity are realized in diplexer A without extra matching circuit. In order to improve the stopband performance, diplexer B based on coupled CR cells is proposed. Furthermore, diplexer B using the proposed design method is implemented by directly combining two bandpass filters (BPFs), which simplifies significantly the design process of diplexers. Diplexer A operated at 1/1.2 GHz and diplexer B operated at 1/1.5 GHz are designed and fabricated. The measured isolation characteristics in diplexer A and diplexer B are all higher than 40 dB. Good agreements between simulated and measured results are achieved, which successfully verifies the proposed design method of diplexers. INDEX TERMS Composite resonator, extra matching circuit, high isolation, impedance transformation, microstrip diplexer, transmission zeros. PIN WEN (S'16) received the B.S. degree in communication engineering and the M.S. degree in communication and information system from East China Jiaotong University, Nanchang, China, in 2012 and 2015, respectively. He is currently pursuing the Ph.D. degree in microwave engineering with Xi'an Jiaotong University, China. In 2015, he became a Research Assistant with East China Jiaotong University. His current research interests include antenna theory, and design and superconducting filter design.

show abstract

Compact Superconducting Diplexer Design With Conductor-Backed Coplanar Waveguide Structures

Cited by 22 publications

References 10 publications

A miniaturized high isolation printed diplexer model based on band pass filter technique for 4G-LTE/5G-Sub 6 GHz applications

A miniaturized high isolation printed diplexer model based on band pass filter technique for 4G-LTE/5G-Sub 6 GHz applications

Separately-designable diplexer with multiple transmission zeroes using common stub-loaded SIR

A Novel Design Method for High Isolated Microstrip Diplexers Without Extra Matching Circuit

Contact Info

Product

Resources

About