Compact Bandpass Filter With Multiple Coupling Paths in Limited Space for Ku-Band Application

Xu, Jun; Wang, Hong; Zhang, Hui; Tang, Hongjun

doi:10.1109/lmwc.2017.2661970

Cited by 15 publications

(14 citation statements)

References 8 publications

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“…for Ku-band applications has been proposed in [7], which consists of five quarter-wavelength (λ/4) stepped-impedance resonators, which are in staggered arrangement. Folded narrow feedlines are used to introduce multiple coupling paths in limited space.…”

Section: Different Bpfs Have Been Proposed For Ku-band Applications mentioning

confidence: 99%

Dual Band BPF Based on Parallel Coupled Lines Loaded by Open Stubs for Ku-Band Satellite Applications

Amar¹,

Dardeer²,

Zekry³

2019

JEMAA

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This paper presents a dual band Band Pass Filter (BPF) operating at both the downlink and uplink frequency bands for Ku-band satellite applications. The commonly used frequency band in mobile communications satellites is the Ku-band. These mobile satellite systems help connect remote regions, vehicles, ships, people and aircraft to other parts of the world and/or other mobile or stationary communications units, in addition to serving as navigation systems. The structure of the proposed filter is based on parallel coupled microstrip lines and four sections are used. Tuning the two operational bands can be achieved using two open-circuited stubs at the first and last sections of the parallel coupled microstrip lines. The proposed filter is adjusted to operate at 12.54 GHz and 14.14 GHz for downlink and uplink bands, respectively. The proposed dual band BPF is fabricated, measured, and good agreement is obtained between simulated and measured results.

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Section: Different Bpfs Have Been Proposed For Ku-band Applications mentioning

confidence: 99%

Dual Band BPF Based on Parallel Coupled Lines Loaded by Open Stubs for Ku-Band Satellite Applications

Amar¹,

Dardeer²,

Zekry³

2019

JEMAA

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“…The competitive potentiality of the proposed filter can be observed from its performance comparison with recently reported works which is shown in Table 1. [3] 13.2/7.5 1.75 >15 2.65f 0 (20 dB) 0.43λ g × 0.22λ g [4] 3.2/20.6 <2.2 12.5 2.9f 0 (20 dB) 1.1λ g × 0.63λ g [5] 8.7/18.4 <2.4 16.5 2.2f 0 (20 dB) 0.43λ g × 0.20λ g [6] 0.97/13.3 1.1 -3.5f 0 (20 dB) 0.094λ g × 0.08λ g PW 0.37/26.7 0.51 16.5 10.1f 0 (21.5 dB) 0.089λ g × 0.10λ g f 0 is the centre frequency (GHz), FBW is the fractional bandwidth (%), IL is the minimum insertion loss (dB), RL is the maximum return loss (dB), S is the selectivity, HS is the harmonic suppression up to, PW is the presented work.…”

Section: Fig 2 Transmission Line Model Of Dmrmentioning

confidence: 99%

“…There are several diversified ways of designing a compact bandpass filter as reported in [1][2][3][4][5][6]. In [1], a lumped bisected π-network is added at input and output of a simple comb-line bandpass filter to generate extra transmission zeros (TZs) in the stopband in order to get ultrawide stopband bandpass filter.…”

mentioning

confidence: 99%

Miniaturised highly selective wide‐band bandpass filter using dual‐mode resonators and inter digital capacitors

Killamsetty

Mukherjee

2017

Electron. lett.

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A wide-band bandpass filter with high selectivity, compact size and wide stopband is presented in this Letter. This proposed filter uses dual-mode resonators (DMRs) as its basic tool. Stepped impedance technique is adopted in designing the DMRs for miniaturising its size. In the construction of filter design, three types of inter digital capacitors (IDCs) are employed; one is used for coupling between DMRs and other two are used at feed lines. The IDCs and open stub resonators are infused in the filter for curbing the harmonics and providing wide stopband. Input-output cross coupling is introduced by making use of hook-shaped feed lines for achieving good selectivity. A miniaturised size of 0.089λ g × 0.10λ g (29.2 × 33 mm 2) with wide stopband up to 10.1f 0 (f 0 is the operating frequency of filter) with 21.5 dB harmonic suppression level is achieved with this design.

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“…Planar technologies are considered for Ku-band filters in space applications as an alternative to coupled waveguide cavities in order to reduce the size and weight of transceiver units [1]. In particular, microstrip filter designs using classical and cross-coupled hairpin, interdigital or slowave resonators in the Ku-band are found in [2].…”

Section: Introductionmentioning

confidence: 99%

Sensitivity Considerations for Inline Fully Canonical Filters at Ku-Band

Tirado¹,

Baro²,

Guerrero³

et al. 2020

PIER M

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In this paper, a planar inline fully-canonical topology is proposed to reduce sensitivity to fabrication tolerances compared to conventional inline all-pole configurations. Major concerns are related with errors in the absolute positioning of via-holes to ground which affect inter-resonator (mainline) couplings. The total expanded sensitivity considering variations of the main-line couplings have been obtained for fully and non-fully canonical configurations. The result shows that sensitivity is lower in the case of fully-canonical topologies. Moreover, the allocation of the transmission zeros plays a key role in terms of sensitivity. A prototype has been designed for the Ku-band based on asymmetrical coupled lines obtaining IL = −1.6 dB, RL below −18 dB, and out-of-band rejection higher than −50 dB.

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Compact Bandpass Filter With Multiple Coupling Paths in Limited Space for Ku-Band Application

Cited by 15 publications

References 8 publications

Dual Band BPF Based on Parallel Coupled Lines Loaded by Open Stubs for Ku-Band Satellite Applications

Dual Band BPF Based on Parallel Coupled Lines Loaded by Open Stubs for Ku-Band Satellite Applications

Miniaturised highly selective wide‐band bandpass filter using dual‐mode resonators and inter digital capacitors

Sensitivity Considerations for Inline Fully Canonical Filters at Ku-Band

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