Synthesis-Applied Highly Selective Tunable Dual-Mode BPF With Element-Variable Coupling Matrix

Lu, Di; Tang, Xiao; Barker, N. Scott; Li, Mei; Yan, Tianying

doi:10.1109/tmtt.2017.2783376

Cited by 30 publications

(27 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…BPFs with center-frequency tuning ratio of 1.7:1 in [6], square-loop-resonator-based BPFs with BW tuning ratio of 2.5:1 in [7], and BPFs with center-frequency and BW tuning ratios of 1.8:1 and 10:1, respectively, in [8]. However, they exhibit high levels of minimum in-band IL (3-5 dB) due to the low unloaded quality factor (Q: 20-100) of the utilized planar RF resonators and their tunability is mostly restricted to center frequency.…”

Section: Examples Of Tunable Dual-mode Bpfs Include Open-loop-resonatmentioning

confidence: 99%

See 1 more Smart Citation

Multi-Mode-Cavity-Resonator-Based Bandpass Filters With Multiple Levels of Transfer-Function Adaptivity

Psychogiou

Gómez‐García

2019

IEEE Access

View full text Add to dashboard Cite

This paper reports on dual-mode-cavity-resonator-based bandpass filters (BPFs) with multiple levels of transfer-function tunability. They are based on substrate-integrated-waveguide cavity resonators that are loaded by four identical metallic posts and give rise to two degenerate modes that are exploited for the filter design. By loading the ends of the posts with variable-reactance elements, quasi-elliptic-type filtering transfer functions with multiple levels of spectral adaptivity can be obtained. These reconfiguration properties include center-frequency control, bandwidth tuning, and intrinsic RF switching-off. The proposed adaptive BPF concept can be extended to high-order transfer functions shaped by 2N poles and 2N transmission zeros (TZs) for BPFs composed of N dual-mode resonators. To prove the experimental viability of the engineered tunable BPF concept, a two-pole/two-TZ prototype and a four-pole/four-TZ prototype with tunable transfer functions in the 1.5-3 GHz band were built and measured. INDEX TERMS Bandpass filter, bandwidth tuning, cavity filter, dual-mode filter, tunable filter, reconfigurable filter, RF filter, substrate-integrated-waveguide (SIW) filter.

show abstract

Section: Examples Of Tunable Dual-mode Bpfs Include Open-loop-resonatmentioning

confidence: 99%

“…BPFs using dual-mode resonators, such as those based on microstrip-type rectangular-and circular-shape patches, are often used in applications in which size is of critical importance due to their ability to support multiple modes within the same resonator volume [6]- [8]. Representative…”

Section: Introductionmentioning

confidence: 99%

Multi-Mode-Cavity-Resonator-Based Bandpass Filters With Multiple Levels of Transfer-Function Adaptivity

Psychogiou

Gómez‐García

2019

IEEE Access

View full text Add to dashboard Cite

show abstract

“…A bandpass filter (BPF) is a device that allows signals of a certain frequency in the range of f a – f b to pass through as is, while others that are out of the range are restrained. Thus, the BPF is a vital passive device in the radio frequency (RF) front-end module of a communication system, and its properties affect the performance of the overall operating system [1,2]. Therefore, the design and fabrication technology are attractive for researchers with the evolution of RF/microwave engineering.…”

Section: Introductionmentioning

confidence: 99%

On-Chip Miniaturized Bandpass Filter Using GaAs-Based Integrated Passive Device Technology For L-Band Application

et al. 2019

View full text Add to dashboard Cite

In this work, a miniaturized bandpass filter (BPF) constructed of two spiral intertwined inductors and a central capacitor, with several interdigital structures, was designed and fabricated using integrated passive device (IPD) technology on a GaAs wafer. Five air-bridge structures were introduced to enhance the mutual inductive effect and form the differential geometry of the outer inductors. In addition, the design of the differential inductor combined with the centrally embedded capacitor results in a compact construction with the overall size of 0.037λ0 × 0.019λ0 (1537.7 × 800 μm2) where λ0 is the wavelength of the central frequency. For the accuracy evolution of the equivalent circuit, the frequency-dependent lumped elements of the proposed BPF was analyzed and modeled through the segment method, mutual inductance approach, and simulated scattering parameters (S-parameters). Afterward, the BPF was fabricated using GaAs-based IPD technology and a 16-step manufacture flow was accounted for in detail. Finally, the fabricated BPF was wire-bonded with Au wires and packaged onto a printed circuit board for radio-frequency performance measurements. The measured results indicate that the implemented BPF possesses a center frequency operating at 2 GHz with the insertion losses of 0.38 dB and the return losses of 40 dB, respectively, and an ultrawide passband was achieved with a 3-dB fraction bandwidth of 72.53%, as well. In addition, a transmission zero is located at 5.32 GHz. Moreover, the variation of the resonant frequency with different inductor turns and metal thicknesses was analyzed through the simulation results, demonstrating good controllability of the proposed BPF.

show abstract

“…Generally, the fully tunable filters can be designed by adopting the resonators with special structures. The multiple mode resonators (MMRs) are a widely used method of fully tunable filter with widely tunable range [1–8], especially the transmission line resonators [1–4, 6–8] or rectangular ring resonators [5]. This method has the advantages of compact size and low cost.…”

Section: Introductionmentioning

confidence: 99%

“…Another classical method to realize the fully tunable filters is by inserting tunable devices into the traditional coupling structures [9–13], which can achieve a more steeply Out-of-band suppression. These fully tunable filters employ a wide variety of resonators, including cavity tunable resonators [8, 9]. However, the design complexity and size of the fully tunable filter is increased.…”

Section: Introductionmentioning

confidence: 99%

A tunable open ring coupling structure and its application in fully tunable bandpass filter

Zhang

Zhao²,

2019

Int. J. Microw. Wireless Technol.

View full text Add to dashboard Cite

This letter presents a novel tunable coupling structure to simplify the design complexity of the miniaturized fully tunable filter by using open ring and varactors. Based on the proposed novel tunable coupling structure, a fully tunable bandpass filter is implemented with independently tunable operating frequency and bandwidth. The tunable resonator and tunable coupling structure can be easily combined to improve Out-of-band suppression performance. The design procedure of a fully tunable bandpass filter consists of five tunable cavities and tunable coupling rings is also proposed. A prototype of the proposed fully tunable filter is built to verify the design experimentally. Good agreement between simulated and measured results is obtained.

show abstract

Synthesis-Applied Highly Selective Tunable Dual-Mode BPF With Element-Variable Coupling Matrix

Cited by 30 publications

References 26 publications

Multi-Mode-Cavity-Resonator-Based Bandpass Filters With Multiple Levels of Transfer-Function Adaptivity

Multi-Mode-Cavity-Resonator-Based Bandpass Filters With Multiple Levels of Transfer-Function Adaptivity

On-Chip Miniaturized Bandpass Filter Using GaAs-Based Integrated Passive Device Technology For L-Band Application

A tunable open ring coupling structure and its application in fully tunable bandpass filter

Contact Info

Product

Resources

About