A Novel Dual-Mode Square Loop Passband Filter with Second Spurious Passband Suppression

Hu, Wei-liang; Yoshimasu, Toshihiko; Liu, Haiwen

doi:10.1109/icccas.2006.285131

Cited by 4 publications

(4 citation statements)

References 7 publications

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“…Comparison results between the proposed BPF and existing designs are summarized in Table 2. The overall performances of the proposed BPF exceed the performances of existing BPFs in terms of insertion loss, harmonic suppression, and I/O feeding style [4][5][6][7]. The proposed BPF has the lowest in-band insertion loss, highest harmonics suppression levels, and non-orthogonal I/O feeding style, which is easily interconnecting and integrating with neighboring devices.…”

Section: Comparison and Discussionmentioning

confidence: 82%

“…Therefore, there is an increasing requirement of 5G band-pass filters (BPFs), which can fulfill the needs of compact size, high integration, and good performances. Modern dual-mode BPFs achieve a size reduction of 50% compared with single-mode ones, but most of them use orthogonal feeding input/output (I/O) ports to excite two degenerate modes, which result in interconnecting difficulties with neighboring devices and higher inband insertion loss with extra bend structure for transition [4][5][6][7]. In addition, modern communication transceiver is a nonlinear system, where the function of harmonics suppression is much preferred when designing modern BPFs.…”

Section: Introductionmentioning

confidence: 99%

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Compact LTCC Dual-Mode Filter With Non-Orthogonal Feeding and Harmonics Suppression for 5g Applications

Li¹,

Li²,

Zhang³

et al. 2020

PIER Letters

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A dual-mode band-pass filter (BPF) for the fifth generation (5G) N78 band applications is proposed based on a 2-layer low temperature cofired ceramic (LTCC) substrate. The proposed BPF is built with a square resonator and two pairs of open-stubs, which suppressed the 2nd-order and 3rd-order 27 and 21 dB, respectively. The proposed BPF not only achieved a size reduction of 50% compared with a single-mode implementation, but also possessed a non-orthogonal input/output (I/O) feeding style, which presents convenient interconnection and integration with neighboring devices. Moreover, the dual-mode BPF does not need a conventional disturbing element to excite two degenerate modes. Comparison and discussion are carried out as well.

show abstract

Section: Comparison and Discussionmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Compact LTCC Dual-Mode Filter With Non-Orthogonal Feeding and Harmonics Suppression for 5g Applications

Li¹,

Li²,

Zhang³

et al. 2020

PIER Letters

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show abstract

“…To overcome this difficulty, many researchers have investigated this problem [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Kuo and Lin [7] use stepped-impedance resonators with different dimensions extended upper stop-band.…”

Section: Introductionmentioning

confidence: 99%

Spurious Pass-Band Suppression in Coupled-Serial-Shunted Lines Wideband Band-Pass Filters

Tsai¹

2012

PIER C

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In this paper, a synthesis method is presented for Chebyshev type II band-pass filters in the microwave frequency range. We investigate the cause of the second harmonic passband of coupled-serial-shunted lines bandpass filters. Filters are employed substrate suspension, wavy-edge coupling, ring resonators, defect ground structure (DGS), and a combination of the wavy-edge coupling and ring resonators may be used and were investigated to suppress the harmonic pass-band. With a combination of the wavy-edge coupledlines and ring resonators, the harmonic pass-band of the parallelcoupled line filter is rejected more effectively. Several filters are fabricated and measured to demonstrate the design.

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“…In [7], two spur-lines are symmetrically attached to the ring resonator to obtain the dual-mode characteristics. Recently, microwave bandpass filter (BPF) circuits are popularly designed on the ground plane, such as slotline with defected ground structure (DGS) stubs [8], defected resonator [9], defected stepped impedance resonator [10], and so on.…”

mentioning

confidence: 99%

A Novel Dual-Mode Bandpass Filter Based on a Defected Waveguide Resonator

Guan¹

2011

ETRI J

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A Novel Dual-Mode Square Loop Passband Filter with Second Spurious Passband Suppression

Cited by 4 publications

References 7 publications

Compact LTCC Dual-Mode Filter With Non-Orthogonal Feeding and Harmonics Suppression for 5g Applications

Compact LTCC Dual-Mode Filter With Non-Orthogonal Feeding and Harmonics Suppression for 5g Applications

Spurious Pass-Band Suppression in Coupled-Serial-Shunted Lines Wideband Band-Pass Filters

A Novel Dual-Mode Bandpass Filter Based on a Defected Waveguide Resonator

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