Hepta‐band bandpass filter based on folded cross‐loaded stepped impedance resonator

Praptodiyono, Supriyanto; Pramudyo, Anggoro Suryo; Chairunissa, Cindy; Alaydrus, Mudrik

doi:10.1049/el.2017.1121

Cited by 13 publications

(12 citation statements)

References 11 publications

(24 reference statements)

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“…The resonant frequencies for even-mode and odd-mode excitation can be determined from the impedance condition at Z IN = ∞ or the admittance condition Y IN = 0 [5], [6], [31]. Fig 6(b) shows the circuit model for the even-mode with the input impedance Z IN −RA1−even mode , which has an opencircuit transmission line.…”

Section: B Design Of Single-band Bpfmentioning

confidence: 99%

“…Fig 11(a), 11(b) and 11(c) show the equivalent circuit models for resonators B1 and C1 (R B1 and R C1 ), the even-mode resonator (R B1 and R C1 ), and the odd-mode resonator (R B1 and R C1 ), respectively. The even-mode and odd-mode resonant frequencies can be determined from the impedance condition Z IN = ∞ or the admittance condition Y IN = 0 [5], [6], [31].…”

Section: Design Of Multiband Bpfmentioning

confidence: 99%

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A Highly Independent Multiband Bandpass Filter Using a Multi-Coupled Line Stub-SIR With Folding Structure

et al. 2020

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The main problem in designing a multiband bandpass filter (BPF) is making each passband response highly independent, where each bandwidth of multiband BPF can be controlled and adjusted separately. To overcome this problem, this paper proposes a highly independent multiband BPF based on a multicoupled line stub-SIR with a folding structure. The proposed multiband BPF is constructed as a multicoupled line to generate a highly independent inter-passband. Moreover, the multiband performance is produced separately and independently by using three sets of resonators: resonator A1/A2 (R A1 and R A2), resonator B1/B2 (R B1 and R B2), and resonator C1/C2 (R C1 and R C2). The three passband frequencies can be independently arranged and designed. To miniaturize the multiband BPF, a folding structure is also proposed. As a result, the multiband BPF has a compact size that is reduced by over 61.29 % compared to previous structures. The even-odd excitation model and the equivalent circuit model are used to analyze the multiband BPF structure. This BPF is designed for GPS applications at 1.57 GHz, WCDMA (3G) at 1.8 GHz, WLAN (WiFi) at 2.4 GHz, LTE (4G) at 2.6 GHz, and 5G communication at 3.5 GHz. To evaluate and validate the proposed structure of the multiband BPF, the circuits are fabricated and tested. The simulated and measured results of the multiband BPF show good agreement. In conclusion, the proposed multiband BPF structure has a highly independent inter passband response and a compact size. INDEX TERMS Compact, folding structure, highly independent, multiband BPF.

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Section: B Design Of Single-band Bpfmentioning

confidence: 99%

Section: Design Of Multiband Bpfmentioning

confidence: 99%

A Highly Independent Multiband Bandpass Filter Using a Multi-Coupled Line Stub-SIR With Folding Structure

et al. 2020

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“…The final step is design and simulate a vivaldi antenna to an array. Vivaldi antenna config-uration is obtained based on [13] and modified the vivaldi input to make distance of vivaldi input as sama as butler matrix. The optimized vivaldi can be seen in Figure 7 where the vivaldi dimension is 6.6 mm 9 mm.…”

Section: Fig 6 Geometry Of Phase Shifter After Optimizationmentioning

confidence: 99%

“…Butler matrix is one of the well-known beam forming which can be used in switched-beam smart antenna system [9]. It is plays an important role in the transmitter and receiver for 5G communication with some advantages such as easy implementation [12], simple, minimal cost [10], the loss involved is very small [8] [13]. This study was conducted on the basis of research [5][2] on the design of vivaldi antennas for 5G, which integrated with 4 4 butler matrix [6][11] at mmWave.…”

Section: Introductionmentioning

confidence: 99%

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Switch-Beam Vivaldi Array Antenna Based On 4x4 Butler Matrix for mmWave

2018

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It will be diffcult to use either omnidirectional or fixed beam antenna due to the high propagation losses caused by atmospheric absorption at mmWave for 5G mobile communication. Several studies have been conducted recently using butler matrix which is part of switchable antenna with some advantages such as simple, minimal cost, low loss, etc. Previous studies also have designed vivaldi array antenna at 28 GHz which provides a fix beam directional radiation pattern with narrow beam that requires real phase setting. However, there has been no research using vivaldi antenna with butler matrix, whereas it has some advantages such as wide bandwidth, high gain, high directivity, etc. This paper proposed 4x4 butler matrix integrated with vivaldi antenna by using phase shift of 45 . The design is developed on a single layer of Rogers RT5880 with dielectric constant 2.2 and thickness 0.254 mm. Best results of simulation were picked for overall system at 28 GHz, and the results of antenna as follows: the return loss was below -10 dB, the realized antennas gain was 10.2 dB with unidirectional radiation pattern and bandwidth antenna of 6 GHz that covers from 25 GHz to 31 GHz. The butler matrix average phase di erent between output port are -44.106 o , 137.38 o , -137.66 o , 43.95 o with phase error of 0.894 o , 2.38 o , 2.66 o , 1.06 o .Antenna array that has been given di erent phase by butler matrix is able to shift radiation pattern on the input port successively with range of beam that can be achieved equal to 185 o .

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Multiband bandpass filter design using E‐plane septa for waveguide application

Li,

Zhang,

Da Xu

et al. 2018

Micro & Optical Tech Letters

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Multiband bandpass filter (BPF) design is proposed by utilizing E‐plane septa to introduce transmission zeros in‐band for waveguide application. Due to the unique employment of E‐plane septa, multiband BPF responses are flexible to realize. Since number of transmission zeros is strongly dependent on the structure of employed septa, by adjusting the parameters of septa, dual‐band, tri‐band, and quad‐band, multiband BPF responses are presented. While various multiband responses can be achieved without changing the structure, it is more competitive and compatible. Somehow, tri‐band and quad‐band W‐band filters are fabricated for validation of the design technique for multiband BPF applications.

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Hepta‐band bandpass filter based on folded cross‐loaded stepped impedance resonator

Cited by 13 publications

References 11 publications

A Highly Independent Multiband Bandpass Filter Using a Multi-Coupled Line Stub-SIR With Folding Structure

A Highly Independent Multiband Bandpass Filter Using a Multi-Coupled Line Stub-SIR With Folding Structure

Switch-Beam Vivaldi Array Antenna Based On 4x4 Butler Matrix for mmWave

Multiband bandpass filter design using E‐plane septa for waveguide application

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