A New Design Approach for a Compact Microstrip Diplexer with Good Passband Characteristics

Rezaei, Abbas; Yahya, Salah I.

doi:10.14500/aro.10999

Cited by 10 publications

(6 citation statements)

References 15 publications

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“…Resonators are widely used in the communication devices such as filters (Yahya, Rezaei, and Khaleel, 2021), diplexers Rezaei and Yahya, 2022), and antenna (Roshani, et al, 2023) to improve the functionality of the performance of devices.…”

Section: Power Divider With Resonatorsmentioning

confidence: 99%

Size Reduction and Harmonics Suppression in Microwave Power Dividers

Roshani,

Salah I. Yahya,

Ghadi

et al. 2023

ARO

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In this paper, several types of microstrip power divider are studied and compared in terms of harmonics suppression and size reductions. The importance of this research lies in the fact that power dividers are critical components in various communication systems, and their performance directly affects the overall system efficiency. The conventional structure of the power divider has an acceptable performance at operating frequency in terms of excellent output ports isolation, low insertion loss, and high return loss, but occupies large size and passes unwanted signals at higher frequencies along with desired signal without any suppression. Harmonics are popular distortion and has different distortion impacts in many different facilities. Recently, several techniques are introduced to overcome these drawbacks. Applied open stubs, applied resonators, lumped reactive components such as capacitors and inductors, coupled lines, defected ground structure (DGS), and electronic band gaps are common methods, which are widely used to overcome these drawbacks. Finally, the study results show that the resonator-based power dividers and coupled-line-based power dividers have good performances in terms of size reduction and harmonic suppression but increase insertion loss parameter. Furthermore, the lumped reactive component-based power dividers and applied DGS and electromagnetic bandgap cells suppress unwanted harmonics, but they need extra process to fabrication, which is undesirable. Moreover, the open-stub-based power dividers have moderate performance with simple structure, but size reduction and harmonics suppression are not so superior in this method.

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Section: Power Divider With Resonatorsmentioning

confidence: 99%

Size Reduction and Harmonics Suppression in Microwave Power Dividers

Roshani,

Salah I. Yahya,

Ghadi

et al. 2023

ARO

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“…Another type of structures that have been widely used to reduce MC between the antenna cells, especially in the MIMO structures, are resonators [ 32 , 33 ]. Resonators have been widely used in the structures of microwave devices to improve the functionality of the components [ 34 , 35 , 36 ]. In [ 37 ], a meandered resonator was proposed to reduce mutual coupling in the antenna array; the incorporation of the resonator resulted in shifting the antenna operating frequency.…”

Section: Introductionmentioning

confidence: 99%

Mutual Coupling Reduction in Antenna Arrays Using Artificial Intelligence Approach and Inverse Neural Network Surrogates

Roshani

Koziel

Yahya

et al. 2023

Sensors

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This paper presents a novel approach to reducing undesirable coupling in antenna arrays using custom-designed resonators and inverse surrogate modeling. To illustrate the concept, two standard patch antenna cells with 0.07λ edge-to-edge distance were designed and fabricated to operate at 2.45 GHz. A stepped-impedance resonator was applied between the antennas to suppress their mutual coupling. For the first time, the optimum values of the resonator geometry parameters were obtained using the proposed inverse artificial neural network (ANN) model, constructed from the sampled EM-simulation data of the system, and trained using the particle swarm optimization (PSO) algorithm. The inverse ANN surrogate directly yields the optimum resonator dimensions based on the target values of its S-parameters being the input parameters of the model. The involvement of surrogate modeling also contributes to the acceleration of the design process, as the array does not need to undergo direct EM-driven optimization. The obtained results indicate a remarkable cancellation of the surface currents between two antennas at their operating frequency, which translates into isolation as high as −46.2 dB at 2.45 GHz, corresponding to over 37 dB improvement as compared to the conventional setup.

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“…They are used in various applications, such as in satellite communication, radar systems, wireless communication, and medical equipment. In recent years, the demand for high-performance microstrip passive devices has increased significantly due to the growing demand for wireless communication technologies such as 5G, Internet of Things (IoT), and autonomous vehicles [1][2][3][4][5][6][7][8][9]. Therefore, the development of novel microstrip passive devices with improved performance characteristics is essential to meet the requirements of modern microwave/RF communication systems.…”

Section: Introductionmentioning

confidence: 99%

A new compact and low phase imbalance microstrip coupler for 5G wireless communication systems

I. Yahya,

Zubir,

Nouri

et al. 2023

PLoS ONE

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Microstrip couplers play a crucial role in signal processing and transmission in various applications, including RF and wireless communication, radar systems, and satellites. In this work, a novel microstrip 180° coupler is designed, fabricated and measured. The layout configuration of this coupler is completely new and different from the previously reported Rat-race, branch-line and directional couplers. To obtain the proposed coupler, the meandrous coupled lines are used and analyzed mathematically. To improve the performance of our coupler, an optimization method is used. The designed coupler is very compact with an overall size of 0.014λg2. The obtained values of S21 and S31 are -3.45 dB and -3.75 dB, respectively at the operating frequency, while the fractional bandwidth (FBW) is 56.2%. It operates at fo = 1.61 GHz (suitable for 5G applications) and can suppress harmonics up to 2.17fo. Another advantage of this coupler is its low phase imbalance, while the phase difference between S21 and S31 is 180°± 0.023°. Therefore, our device is a balanced coupler with ±0.3 dB magnitude unbalance at its operating frequency. It is important to note that it is very difficult to find a coupler that has all these advantages at the same time. The proposed 180° coupler is fabricated and measured. The comparison shows that the measurement and simulation results are in good agreement. Therefore, the proposed coupler can be easily used in designing high-performance 5G communication systems.

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A New Design Approach for a Compact Microstrip Diplexer with Good Passband Characteristics

Cited by 10 publications

References 15 publications

Size Reduction and Harmonics Suppression in Microwave Power Dividers

Size Reduction and Harmonics Suppression in Microwave Power Dividers

Mutual Coupling Reduction in Antenna Arrays Using Artificial Intelligence Approach and Inverse Neural Network Surrogates

A new compact and low phase imbalance microstrip coupler for 5G wireless communication systems

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