Miniaturized frequency-agile bandpass filter integrated single-pole double-throw switch

Xu, Jin; Chen, Zhiyu; Cai, Qi-Hang

doi:10.1002/mmce.21403

Cited by 3 publications

(4 citation statements)

References 7 publications

(7 reference statements)

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“…The comparison of the proposed filtering switch with previous prototypes is outlined in Table 2. As compared with the reported PCB filtering switches, [2][3][4][5][6][7][8] the proposed one features much smaller in-band insertion loss and better in-band return loss. Although the in-band insertion loss of the proposed filtering switch is at the same level as the DR or CR ones, 9,10 it features lighter weight because no metal cavity is engaged.…”

Section: Experiments Results and Discussionmentioning

confidence: 94%

“…Therefore, co-designs of switch and filter, namely switchable filter or filtering switch, have been presented by researchers. Lots of single-band [2][3][4][5] or dual-band [6][7][8] filtering switches have been designed based on the microstrip resonators by using the printed circuit board (PCB) technology. Their planar structures were convenient for integration and featured the advantages of light weight.…”

Section: Introductionmentioning

confidence: 99%

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Low‐loss filtering switch by using dielectric waveguide resonators

Qin

Zhang

Liu

et al. 2021

Int J RF Mic Comp-Aid Eng

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A low-loss filtering switch by using the dielectric waveguide resonators (DWRs) is proposed. It is composed of a dielectric part and a printed circuit board (PCB) part, which are electrically connected by soldering. The filtering function is mainly implemented by the coupled DWRs and the switching function is realized on the PCB by simply changing the resonant frequency of the DWR. A fourth-order filtering switch, in which two DWRs are designed to be switchable, is designed for verification. When the PIN diodes are turned off, the filtering switch is on and an excellent bandpass response is obtained. No extra loss is caused by the off-state PIN diodes. When the PIN diodes are turned on, the resonant frequencies of the two switchable DWRs are moved away so that the filtering switch is off. Then, the designed filtering switch is fabricated and measured. The simulated and measured results exhibit excellent accordance. In on-state measurement, the passband is from 3.5 to 3.6 GHz and the in-band insertion loss is as low as 0.8 dB. Nevertheless, the proposed design owns much lighter weight since no metal cavity is used. In the off-state measurement, the isolation is better than 36 dB.

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Section: Experiments Results and Discussionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Low‐loss filtering switch by using dielectric waveguide resonators

Qin

Zhang

Liu

et al. 2021

Int J RF Mic Comp-Aid Eng

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show abstract

“…Filter-integrated switch (FIS) as depicted in Figure 1 is another integrated/multifunction device. From the year 2006 onwards, numerous studies have reported filter-integrated double pole double throw (DPDT) switch [5], single pole single throw (SPST) switch [6][7][8], and SPDT switch [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. In order to produce FISs and integrate BPF with SPDT switch in one device, several techniques have been used, such as dielectric resonators (DRs) [15], LC resonators [11], substrate integrated suspended line (SISL) [30], and common shorted stepped-impedance resonator (CSSIR) [25].…”

Section: Introductionmentioning

confidence: 99%

Absorptive Filter Integrated Single Pole Double Throw Switch Using Switchable T-Shape Resonator for Iot Applications

Shairi¹,

Zakaria²,

Wong³

et al. 2020

PIER C

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In this paper, an absorptive filter-integrated switch (FIS) using switchable T-shape resonators is presented. The FIS was made up of two absorptive T-shape resonators and integrated with single pole double throw (SPDT) switch. A simple mathematical analysis of isolation and insertion loss of filter-integrated SPDT switch is discussed. PIN diodes were used as the switching elements for the SPDT switch and to reconfigure between the band-stop and bandpass responses. The proposed absorptive FIS design could be used for internet of things (IoT) applications such as Zigbee and Bluetooth at an operation frequency of 2.45 GHz. As a result, the proposed FIS exhibited low magnitude of insertion loss and high isolation. Therefore, the key advantages of the proposed FIS design are low insertion loss, high isolation, and good return loss at both ON-and OFF-state ports.

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“…From the year 2016 onwards, numerous studies have reported on filterintegrated single pole hepta throw (SP7T) switch, 6 single pole quad throw (SPST) switch 7,8 and SPDT switch. [7][8][9][10][11][12][13][14][15][16][17][18] In order to produce FISs and integrate band-pass filter (BPF) with SPDT switch in one device, several techniques have been used, such as dielectric resonators (DRs), LC resonators, substrate integrated suspended line (SISL) and common shorted stepped-impedance resonator (CSSIR).…”

Section: Introductionmentioning

confidence: 99%

Absorptive filter integrated single pole double throw switch using switchable ring resonator

Shairi

Zakaria

Zahari

et al. 2020

Int J RF Microw Comput Aided Eng

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In this paper, a reconfigurable ring resonator-based filter integrated switch (FIS) was presented. The FIS was made up of two absorptive ring resonators, reconfiguring between band-stop and band-pass responses, and integrated with single pole double throw (SPDT) switch. A simple mathematical analysis of isolation and insertion loss of filter-integrated SPDT switch was discussed. PIN diodes were used as the switching elements for the SPDT switch and to reconfigure between the band-stop and band-pass responses. The proposed absorptive FIS design could be used for wireless data communication systems such as Zigbee and Bluetooth at an operation frequency of 2.45 GHz. As a result, the proposed FIS exhibited 2 dB of insertion loss and better than 38 dB of isolation. Therefore, the key advantages of the proposed FIS design are low insertion loss, high isolation and good return loss at both ON-and OFF-state ports.

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Miniaturized frequency-agile bandpass filter integrated single-pole double-throw switch

Cited by 3 publications

References 7 publications

Low‐loss filtering switch by using dielectric waveguide resonators

Low‐loss filtering switch by using dielectric waveguide resonators

Absorptive Filter Integrated Single Pole Double Throw Switch Using Switchable T-Shape Resonator for Iot Applications

Absorptive filter integrated single pole double throw switch using switchable ring resonator

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