New compact low-pass filter (LPF) using cascaded square open loop resonator

Hammed, Raaed T.; Hassan, Solaf H.; Ajeel, Soaad L.

doi:10.1016/j.aeue.2018.05.030

Cited by 8 publications

(4 citation statements)

References 15 publications

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“…The Wilkinson power divider has various applications in microwave systems, such as in wireless connections and radar communication. The lowpass filter (LPF) rejects the high frequency and spurious signals in communication systems 1,2 . The power divider and LPF are the two passive components which can be integrated, forming a filtering power divider (FPD) that acts like a single and more efficient device.…”

Section: Introductionmentioning

confidence: 99%

“…The lowpass filter (LPF) rejects the high frequency and spurious signals in communication systems. 1,2 The power divider and LPF are the two passive components which can be integrated, forming a filtering power divider (FPD) that acts like a single and more efficient device. Earlier, in conventional structures, they were designed individually and then connected to a quarter-wavelength transmission line, leading to counterfeit frequencies and large circuit size.…”

Section: Introductionmentioning

confidence: 99%

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A compact filtering power divider with low‐pass response and wide harmonic suppression

Mandal

Moyra

2022

Int J RF Mic Comp-Aid Eng

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This article presents a miniaturized filtering power divider with low-pass behavior and a wide attenuation band. The proposed FPD has an operating frequency (f o ) of 1.52 GHz with a relative stopband rejection of 165% and an electrical circuit size of (0.25λ g Â 0.14λ g ). The microstrip structure responsible for low-pass filter response is modeled using two rectangular-shaped open resonators (ORs) loaded with multiple sections of the interdigital capacitor. The low-pass filter operates at a cut-off frequency of 1.56 GHz and passband insertion loss of 0.35 dB. The output ports are connected with a 100 Ω isolation resistor to obtain good isolation in the passband. The two dissimilar defected ground structures are introduced in the ground plane for achieving circuit miniaturization and wide harmonic suppression up to 15 GHz. The electromagnetic simulated results of both the low-pass filter and FPD show a well-matched behavior with the experimental ones. The proposed FPD is suitable for GPS applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A compact filtering power divider with low‐pass response and wide harmonic suppression

Mandal

Moyra

2022

Int J RF Mic Comp-Aid Eng

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“…All previous demands make the RF filters compatible with the modern wireless technologies [1,2]. There is an enormous demand for designing and implementing a low pass filter with a pass-band covering the L-band (1-2 GHz), S-band (2-4 GHz), and C-band (4)(5)(6)(7)(8). Microstrip low pass filters with advanced features have been widely utilized in various technological aspects and due to their importance; many techniques have been used to obtain the required features.…”

Section: Introductionmentioning

confidence: 99%

“…Microstrip low pass filters with advanced features have been widely utilized in various technological aspects and due to their importance; many techniques have been used to obtain the required features. One of the techniques used was cascaded technique where resonators are placed in horizontal or vertical topology, but it needs a larger occupied area in addition to larger coupling between resonators is occurred [3,4]. Other techniques can also be used to improve the behaviour of the low pass filter such as stepped-impendence resonators (SIR) [5,6], defected ground-plane structures (DGS) [7][8][9][10], combination of DGS and DMS [11], interdigital line resonator (ILR) [12], and meander-loop resonator [13], meander inductor [14,15], complementary split-ring resonator (CSRR) [16], and combination of SIR and DGS [17].…”

Section: Introductionmentioning

confidence: 99%

Compact tunable U-Hi-Lo low pass filter using quasi C-shaped stubs

Ali¹,

Boutejdar²

2020

J. Inst.

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This paper introduces a tunable U-form low pass filter composed of Hi-Lo impedance lines with a pair of quasi C-shaped inductors for covering L-band, S-band, and C-band. The quasi- C-shaped inductors are integrated for the purpose of widening pass-band, minimizing the insertion loss, and improving the roll-off rate. The constructed topology has been printed on RO4003 with permittivity of 3.38, loss tangent of 0.0027, and height of 0.813 mm. The filter is distinguished with a compact size of 15.5 × 10.5 mm2, in addition to its low insertion loss of 0.6 dB in L-band and S-band, sharpness factor of 28.8 dB/GHz, and -20 dB stop-band of 4.85 GHz. A pair of lumped capacitors are both embedded in the substrate between the open ends of the C-shaped inductors and the ground plane for achieving a tuning range from 4.7 GHz till 7.56 GHz when using 0.2 pF lumped capacitors. Consequently, it will lead to a reduction in size of 37.5 % when compared to the size of the conventional LPF. Good consistency between simulated and measured characteristics of the fabricated LPF is achieved with/without lumped capacitors.

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