Design of 5 GHz‐compact reconfigurable DGS‐bandpass filter using varactor‐diode device and coupling matrix technique

Boutejdar, A.

doi:10.1002/mop.29561

Cited by 27 publications

(21 citation statements)

References 29 publications

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“…According to the types of tuning elements used, these tunable filters can be classified as varactor‐tuned microwave filters, radio frequency microelectromechanical system (RF MEMS) tunable microwave filters, ferroelectric film tunable microwave filters, and piezoelectric transducer (PET) tunable microwave filters . Varactor‐tuned microwave filters attract very active research; however, the variation of the insertion loss of the filters in the tuning range is larger and the third‐order intercept point is lower, which limits their applications in high power signal systems . RF MEMS tunable microwave filters have the advantages of low insertion loss and high linearity, but a RF MEMS tends to be very sensitive to environmental conditions such as air moisture, temperature, and vibrations, and is expensive due to its complicated technology .…”

Section: Introductionmentioning

confidence: 99%

Effects of dielectric substrates on piezoelectric transducer tunable filter

Cao

Yan

Yin

2019

Micro & Optical Tech Letters

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This article represents the effects of dielectric substrates on the performances of piezoelectric transducer (PET) tunable bandpass filters. The filter consists of two open loop resonators that are coupled by a magnetic coupling. A capacitive cross coupling between input and output port is introduced, which produces two transmission zeros in the lower and upper stopbands. Three dielectric substrates with various dielectric constants are used as perturbers, and their effects on the coupling coefficient and quality factor of the microstrip filter are analyzed. A PET tunable filter with each substrate as a perturber is fabricated and measured.

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Section: Introductionmentioning

confidence: 99%

Effects of dielectric substrates on piezoelectric transducer tunable filter

Cao

Yan

Yin

2019

Micro & Optical Tech Letters

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“…and Hejazi, et. al. proposed filter using vertical and horizontal cascaded DGSResonators [7]- [11] and hairpin slots [12], [13]. The disadvantages in this works are the complicated used DGS shapes, the undesired coupling between the DGS resonators and the large size of the used filter structures.…”

Section: Introductionmentioning

confidence: 99%

Design and Fabrication of Tri-Stopband Bandstop Filters Using Cascaded and Multi-Armed Methods

Boutejdar

Bennani

2017

AEM

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In this paper, we proposed a compact C-open-loop ring resonator and its equivalent circuit. The second cascaded bandstop filter (BSF) are designed using this simple C-ring resonator. The double ring BSF consists of two cascaded Cring resonators, which are placed on the RO4003 substrate, while the other triple BSF structure consists of tree cascaded C-ring resonators, which are connected with input and output through microstrip feed lines. The both filters are simulated, optimized and partially realized using MWR simulator and Anritsu E5072A vector network analyzer VNA. In order to reduce the size and to improve the filter characteristics, novel compact filter topologies are designed basing on the previous structures. The proposed multi-band BSFs consist of several open-loop ring resonators placed vertically overlapping (coupled multi-armed ring resonator). Using this idea, the filter topologies with design flexibility, close size and excellent results are reached. The novel compact multi-band BSFs produce several stopband along a frequency range from DC to 9 GHz, in which each separate band exhibits an acceptable and useful bandwidth. Each stopband has regenerated two reflexion zeros, what leads to a good sharpness factors in the transition domains. Good agreement between the experimental results, full-wave simulation has been achieved. Such compact and flexible filters can be successfully used in several microwave and in modern wireless and mobile/satellite communication systems.

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“…Most DGS structures consist of two-dimensional periodic slot in the ground metallic plane. Several variations of area shapes such as triangle, square, circle, have different effects [22][23][24]. It is well known that in conventional DGS microstrip structures, there is always a tradeoff between the stopband and passband characteristics.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, reducing the size of the slot would improve the return loss while degrading the stopband characteristics. In order to simultaneously improve the passband and stopband performance of the DGS microstrip structures, some efforts have been reported in [10][11][12]22]. However, the problem of DGS microstrip structure with good performance in both the passband and stopband was not fully solved.…”

Section: Introductionmentioning

confidence: 99%

Design of Compact Reconfigurable Broadband Band-Stop Filter Based on a Low-Pass Filter Using Half Circle DGS Resonator and Multi-Layer Technique

Boutejdar¹

2017

PIER C

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Abstract-This paper describes the design of a two-pole low-pass and band-stop filters. The low-pass structure is designed at the cutoff frequency of 2 GHz for the L-Band applications. This architecture uses half circle defected ground structure HCDGS instead full circle DGS resonator. Both the HCDGS shapes are etched in the ground plane and coupled via a substrate with a compensated capacitor. The rejection bandwidth of the LPF covers a large wideband spectrum. Therefore, the band suppression reaches more than 3f c. The filter is simulated and fabricated. The measured results are in good agreement with the full-wave simulated ones, showing the merits of compact size and sharp roll-off. The multi-layer technique has been used in order to realize a transformation from low-pass behaviours to band-stop characteristics, keeping the same passband features. The new extracted band-stop topology is simulated and optimized using an RO4003 substrate with relative permittivity of 3.38 and thickness of h = 0.813 mm. The structure has a wide stopband with over 20 dB rejection from 3.5 GHz to 8.5 GHz. Such filters can be used for L-band and military applications.

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Design of 5 GHz‐compact reconfigurable DGS‐bandpass filter using varactor‐diode device and coupling matrix technique

Cited by 27 publications

References 29 publications

Effects of dielectric substrates on piezoelectric transducer tunable filter

Effects of dielectric substrates on piezoelectric transducer tunable filter

Design and Fabrication of Tri-Stopband Bandstop Filters Using Cascaded and Multi-Armed Methods

Design of Compact Reconfigurable Broadband Band-Stop Filter Based on a Low-Pass Filter Using Half Circle DGS Resonator and Multi-Layer Technique

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