Compact Frequency and Bandwidth Reconfigurable Microwave Filter

Kingsly, Saffrine; Kanagasabai, Malathi; Alsath, M. Gulam Nabi; Kumar, P Sandeep; Rao, T. Rama; Indhumathi, K.; Subbaraj, Sangeetha; Selvam, Yogeshwari Panneer

doi:10.1007/s11277-020-07652-0

Cited by 2 publications

(3 citation statements)

References 17 publications

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“…The annular ring slot antenna is deemed for multiple band applications. The three radio frequency PIN diodes including stub load are considered in circular slot to attain reconfiguration frequency 13–15 . The antenna size is huge and does not utilize additional circuit for function.…”

Section: Introductionmentioning

confidence: 99%

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Narrow and wide band monopole antenna design using heterogeneous bidirectional recurrent neural network for LTE and UWB applications

Ramya,

Vijayalakshmi

2024

Int J Communication

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SummaryThe proposed antenna is a small wideband monopole with wideband circular polarization using heterogeneous bidirectional recurrent neural network for both narrow and wide band applications (NWB‐MAD‐HBRNN). The electromagnetic structure is designed, fabricated, and simulated with 1 mm thickness on FR4 substrate material along dielectric constant 4.3. The proposed antenna includes 4.3–8.85 GHz for ultrawideband applications; it contains reconfigurable narrow band for L‐band 1.27 GHz, LTE, and ultrawideband applications. To enhance the antenna impedance bandwidth (BW) along axial ratio bandwidth (ARBW), a slit is etched at the antenna patch, a rectangular stub is inserted into the ground plane, and semicircular stub is added to the top of antenna feed line. The better agreement is observed in the measured and simulated gain performance of 4.8 dB for LTE band applications. The proposed NWB‐MAD‐HBRNN design provides 13.50%, 18.91%, and 22.58% higher bandwidth and 18.36%, 20.38%, and 27.58% lower return loss than the existing designs, such as bio‐inspired wideband antenna for wireless applications based on perturbation technique (BWA‐WA‐PA), a compact circularly polarized modified printed monopole antenna for wireless applications (CCP‐MPMA‐WA), and new multiband monopole antenna for certain broadband wireless applications along wireless personal communications (PA‐MMA‐BWA), respectively.

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Section: Introductionmentioning

confidence: 99%

“…The three radio frequency PIN diodes including stub load are considered in circular slot to attain reconfiguration frequency. [13][14][15] The antenna size is huge and does not utilize additional circuit for function. The presented circular microstrip reconfigurable patch antenna (MPA) is positioned along the U slot.…”

mentioning

confidence: 99%

Narrow and wide band monopole antenna design using heterogeneous bidirectional recurrent neural network for LTE and UWB applications

Ramya,

Vijayalakshmi

2024

Int J Communication

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“…In this letter, we experimentally demonstrate EIT response in a microwave circuit with indirectly coupled high-temperature superconducting (HTS) resonators. In the microwave region, the quality factor (Q) of superconducting resonator, which resonate at standing-wave mode, can be as high as an order of 10 5 , much higher than traditional res-onator used for filters [17][18][19][20][21], making it an ideal choice for implementing indirectly CRIT. In our proposed method, only one waveguide is needed to be coupled with the resonators, which is more easily realized compared with indirect coupled whispering-gallery-mode cavities [15], since the standing-wave mode will couple to the waveguide in two directions.…”

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confidence: 99%

Electromagnetically induced transparency in indirectly coupled high‐temperature superconducting resonators

Zheng,

Huang,

Wang

et al. 2023

Electronics Letters

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In this letter, electromagnetically induced transparency (EIT) is implemented in the microwave region with an experimental system composed of two indirectly coupled high‐temperature superconducting resonators. The transition condition between EIT and Autler–Townes splitting is analyzed, giving a physical explanation of this transition based on the superposition of dressed modes in a three‐level system. Benefit from the ultra‐low loss of superconducting circuit, it is experimentally shown that either EIT or Autler–Townes splitting can be explicitly achieved through control of the detuning between the two resonators and a group delay as high as 5 μs is obtained for the EIT case. This work suggests that high temperature superconducting circuit is a concise and explicit platform for investigating indirectly coupled resonators with standing‐wave modes and the physical mechanism underneath coherence phenomena in the microwave region.

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Compact Frequency and Bandwidth Reconfigurable Microwave Filter

Cited by 2 publications

References 17 publications

Narrow and wide band monopole antenna design using heterogeneous bidirectional recurrent neural network for LTE and UWB applications

Narrow and wide band monopole antenna design using heterogeneous bidirectional recurrent neural network for LTE and UWB applications

Electromagnetically induced transparency in indirectly coupled high‐temperature superconducting resonators

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