Compact Ultra-Wideband Printed Bandpass Filter Based on Coupled-Line Resonator Loading

Djeddi, Tarek; Elsaadany, Mahmoud; Shams, Shoukry I.; Hamouda, Walaa

doi:10.1109/antem.2018.8572885

Cited by 5 publications

(5 citation statements)

References 9 publications

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“…The compensated inductors (𝐿 = 0.2 nH) were generated with the transmission line. The cut-off Table 3 provides a comparison with other UWB techniques [26][27][28]. The previous studies are chosen from the requirements of the Federal Communications Commission.…”

Section: Resultsmentioning

confidence: 99%

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Design of a Compact Ultra-Wideband Bandpass Filter Using Inductively Compensated Parallel-Coupled Lines

2021

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An ultra-wideband bandpass filter (UWB-BPF) using inductively compensated parallel-coupled lines (ICPCL) is presented in this article. It consists of three circuits: a high-pass filter (HPF), a lowpass filter (LPF), and a transmission line. The HPF and the LPF are independently synthesized from the ICPCL. The proposed filter can suppress unwanted frequencies in the upper stopband and increase the skirt slope of the frequency response in the transition bands. The fabricated UWB-BPF with compact size provides good passband performances, with insertion loss of better than −0.49 dB and return loss of better than −12 dB in the frequency range of 2.92–10.95 GHz (the bandwidth of 8.03 GHz). The 107% bandwidth is achieved. In addition, the proposed filter can suppress the spurious frequencies at 2f0, which is greater than 30 dB. The measured results accord well with the simulation results. The novelty of the paper is the introduction of the ICPCL for the construction of the compact UWB-BPF.

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Section: Resultsmentioning

confidence: 99%

“…In [26], the circular ring resonator was applied to the BPF. In [27], the coupled-line resonator was used to design the UWB filter. Additionally, in [28], lumped capacitors were added in the UWB filter.…”

Section: Resultsmentioning

confidence: 99%

Design of a Compact Ultra-Wideband Bandpass Filter Using Inductively Compensated Parallel-Coupled Lines

2021

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“…Specific types of sensors (e.g., gas sensors) require the use of a resonator with a very narrow bandwidth. Nevertheless, the problem of searching for a resonator design with a given center frequency, as well as with a given bandwidth, considered in this paper, is relevant for most types of devices Due to their small circuit sizes (up to several millimeters in each dimension), such resonators can be used in hybrid integration with small wireless networking and radar devices [41,42]. Ultra-wideband (multi-mode) microwave filters are an essential part of the radar sensor systems [4,43,44] and antenna sensors [2] which are of high interest due to the development of unmanned vehicles and robotics.…”

Section: Introductionmentioning

confidence: 99%

The Automatic Design of Multimode Resonator Topology with Evolutionary Algorithms

Stanovov

Khodenkov²,

Popov³

et al. 2022

Sensors

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Microwave electromagnetic devices have been used for many applications in tropospheric communication, navigation, radar systems, and measurement. The development of the signal preprocessing units including frequency-selective devices (bandpass filters) determines the reliability and usability of such systems. In wireless sensor network nodes, filters with microstrip resonators are widely used to improve the out-of-band suppression and frequency selectivity. Filters based on multimode microstrip resonators have an order that determines their frequency-selective properties, which is a multiple of the number of resonators. That enables us to reduce the size of systems without deteriorating their selective properties. Various microstrip multimode resonator topologies can be used for both filters and microwave sensors, however, the quality criteria for them may differ. The development of every resonator topology is time consuming. We propose a technique for the automatic generation of the resonator topology with required frequency characteristics based on the use of evolutionary algorithms. The topology is encoded into a set of real valued parameters, which are varied to achieve the desired features. The differential evolution algorithm and the genetic algorithm with simulated binary crossover and polynomial mutation are applied to solve the formulated problem using the dynamic penalties method. The experimental results show that our technique enables us to find microstrip resonator topologies with desired amplitude-frequency characteristics automatically, and manufactured devices demonstrate characteristics very close to the results of the algorithm. The proposed algorithmic approach may be used for automatically exploring the new perspective topologies of resonators used in microwave filters, radar antennas or sensors, in accordance with the defined criteria and constraints.

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“…In recent studies, the coupled-line structures are used by researchers to design a bandpass filter [1]- [11]. This structure is used to acquire the bandpass filter with wide bandwidth [1]- [6]. In [7], the folded coupled line technique successfully suppresses the second harmonic and provides a size reduction of 63 %.…”

Section: Introductionmentioning

confidence: 99%

Cross-Coupled Line Bandpass Filter Based on Modified Parallel-Coupled Line Structure

Darwis¹,

Rahayu

Sutrisno

et al. 2022

J. Elektron. dan Telekomun.

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This paper presents a study of a narrow bandwidth of the bandpass filter with a cross-coupled line structure. This structure was designed to have a good filter selectivity with the transmission zeros and a simple design. Since the structure has a cross shape, cross-coupling between the resonators consequently occurs. This interferes with the passband of the filter. Optimization in the size of the coupled lines and transmission lines was done to minimize the interference. Rogers RT/duroid 5880 was used as a substrate to fabricate the bandpass filter to verify the proposed design. As a result, the fabricated cross-coupled line bandpass filter has an 80 MHz of 3 dB bandwidth with operating frequency ranges from 2.97 GHz to 3.05 GHz. The bandwidth is reduced by 20 % from the specification.It shows that the cross-coupled line structure can yield a narrow bandwidth. Based on the 3 dB bandwidth, the center frequency is shifted 0.33 % above the specification. Meanwhile, the return loss and insertion loss of the proposed bandpass filter successfully comply with the required specifications. In conclusion, the proposed bandpass filter can be applied to S-Band applications that require narrow bandwidth.

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Compact Ultra-Wideband Printed Bandpass Filter Based on Coupled-Line Resonator Loading

Cited by 5 publications

References 9 publications

Design of a Compact Ultra-Wideband Bandpass Filter Using Inductively Compensated Parallel-Coupled Lines

Design of a Compact Ultra-Wideband Bandpass Filter Using Inductively Compensated Parallel-Coupled Lines

The Automatic Design of Multimode Resonator Topology with Evolutionary Algorithms

Cross-Coupled Line Bandpass Filter Based on Modified Parallel-Coupled Line Structure

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