High-Performance LPF Using Coupled C-Shape DGS and Radial Stub Resonators for Microwave Mixer

Belbachir, Abdelmounaim Kchairi; Boussouis, Mohamed; Touhami, Naima Amar

doi:10.2528/pierl15090105

Cited by 13 publications

(7 citation statements)

References 9 publications

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“…Compact design, low insertion loss and high return loss in the passband and high rejection in the stopband are necessary for filters used in modern communication applications. To meet these requirements, many methods are proposed [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. A lowpass filter using stepped impedance and open stubs is proposed in [2] wherein semicircular stepped impedance resonators (SIRs) are used to make the structure more compact than conventional structures.…”

Section: Introductionmentioning

confidence: 99%

“…Using transformed radial stubs, a new type of lowpass filter with ultra-wide band rejection and compact size is introduced in [12]. Defective ground structures (DGS) can be used to obtain wide stopband with high suppression level [13][14][15]. In [13], the proposed single DGS unit provides dual finite attenuation poles that can be independently controlled.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Compact Microstrip Lowpass Filter With Ultra-Wide Stopband Using Patch Resonators and Open Stubs

Rekha¹,

Abdulla²,

Raphika³

et al. 2017

PIER C

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A compact microstrip lowpass filter with ultra-wide stopband characteristics and high suppression level is presented. To achieve compact size and wide stopband suppression along with improved impedance matching, symmetrically loaded resonant patches, open stubs and stair shaped high impedance stub are introduced in the filter. The measurement results show good agreement with the simulations. The 3 dB cutoff frequency of the filter is 2.44 GHz. The stopband with attenuation level better than 22 dB is extended from 2.84 GHz to 16 GHz, hence an ultra-wide stopband with 6th harmonic suppression is achieved. The proposed filter has low insertion loss and high return loss in the passband, together with compact size of 0.257λ g × 0.148λ g , where λ g is the guided wavelength at cutoff frequency. The relative stop bandwidth of the proposed design is identified to be 139.5%.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Compact Microstrip Lowpass Filter With Ultra-Wide Stopband Using Patch Resonators and Open Stubs

Rekha¹,

Abdulla²,

Raphika³

et al. 2017

PIER C

View full text Add to dashboard Cite

show abstract

“…3 shows the strength of coupling as described with the coupling coefficient which can be computed according to the following formula [17,18]: where f 1 and f 2 are resonant frequencies of coupled resonators. The resonant frequencies can be precisely found from electromagnetic simulations.…”

Section: Coupling Problem Between Antenna Array Resonatorsmentioning

confidence: 99%

Novel Decoupling Technique for Enhancing the Mutual Coupling Between Printed Antennas

Oulhaj¹,

Touhami²,

Adnane³

et al. 2017

PIER M

Self Cite

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Abstract-In this work, an E-shape Defected Ground Structure (DGS) is achieved to reduce the mutual coupling between two nearby microstrip antennas up to 47% (from 0.064 to 0.03). Both antennas radiate in the same frequency band of 10 GHz. The technique is based on a wall integrating periodic structure permitting the absorption of the electromagnetic field. By using this structure, it was possible to achieve a 20 dB reduction in the insertion loss S 21 between the two microstrip patch antennas with center-to-center distance of 0.45λ 0 (λ 0 is the free-space wavelength). The obtained coupling coefficient demonstrates that there is a good isolation between the two antennas. EM solver, simulating the reflection and transmission coefficients of the designed antenna arrays, achieves the reduction of the mutual coupling. The simulated results are verified by measuring the fabricated prototypes.

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“…Using a complementary rectangle split ring defected microstrip structure (CRSR-DMS) and DGSs, a lowpass filter with good passband and wide stopband performance is designed in [14]. A high performance lowpass filter suitable for microwave mixer application is introduced in [15] and has good characteristics such as sharp selectivity and wide stopband. In [16] a meandered slot resonator is designed to develop a compact lowpass filter with a uniform transmission line.…”

Section: Introductionmentioning

confidence: 99%

Improved Frequency Response of Microstrip Lowpass Filter Using Defected Ground Structures

Rekha¹,

Abdulla²,

Jasmine³

et al. 2018

PIER C

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Abstract-The frequency response characteristics of a basic microstrip lowpass filter improved using H-shaped defected ground structures are presented. The proposed defected ground structures behave as a resonant element at high frequency and thus eliminate the stopband frequencies to achieve wide stopband rejection. The 3 dB cutoff frequency of the filter is 1.935 GHz. Due to the defects etched in the ground plane of the basic structure, the harmonic rejection is improved from 5th to 10th order along with low insertion loss and voltage standing wave ratio together with good selectivity. The compact filter has a size of 0.0338λ 2 g , with λ g = 85.18 mm being the guided wavelength at the cutoff frequency. The characteristics of the lowpass filter are verified through simulation and measurement. Consistent and stable results are obtained.

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High-Performance LPF Using Coupled C-Shape DGS and Radial Stub Resonators for Microwave Mixer

Cited by 13 publications

References 9 publications

Compact Microstrip Lowpass Filter With Ultra-Wide Stopband Using Patch Resonators and Open Stubs

Compact Microstrip Lowpass Filter With Ultra-Wide Stopband Using Patch Resonators and Open Stubs

Novel Decoupling Technique for Enhancing the Mutual Coupling Between Printed Antennas

Improved Frequency Response of Microstrip Lowpass Filter Using Defected Ground Structures

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