Enhanced Design of Two-Section Microstrip-Slot Branch Line Coupler with the Overlapped λ/4 Open Circuited Lines at Ports

Shukor, Nor Azimah Mohd; Seman, Norhudah

doi:10.1007/s11277-015-3138-z

Cited by 13 publications

(19 citation statements)

References 8 publications

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“…M odern wireless communication systems widely need to microstrip passive devices such as filters, [1][2][3][4][5][6] diplexers, [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] multiplexers (triplexers [23][24][25][26][27][28][29][30] and quadruplexers, [31][32][33][34][35][36][37] five-channel multiplexer [38] ), and couplers. [39][40][41][42][43][44][45][46][47][48][49] For all of these passive devices, it is very necessary to have small dimensions, low insertion loss (IL), low return loss (RL), suppressed undesired harmonics, sharp roll-off at the edge of passbands (high frequency selectivity), etc. The number of re...…”

Section: Introductionmentioning

confidence: 99%

“…Microstrip couplers have four ports, which they should create two passing channels and an isolation channel. [39][40][41][42][43][44][45][46][47][48][49] In addition to losses and selectivity, the phase shift is an important factor. In 90° couplers, the phase difference between the two passing channels should be close ± 90° [39][40][41].…”

Section: Introductionmentioning

confidence: 99%

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A Review on the Structure, Application and Performance of the Passive Microstrip Devices

Rezaei

Yahya

2022

Cihan U Erbil SCI J

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Microstrip technology is widely applied for design and implementation of several communication devices such as filters, diplexers, triplexers, multiplexers, couplers, etc. They are utilized to isolate desired signals and remove disturbing signals. The layout of filters, diplexers and triplexers have two, three and four ports, respectively. Passive filters have at least one pass channel, whereas diplexers have at least two channels to transmit the desired signal, and multiplexers have more passbands with more channels. In order to implement the passive components, first a cell called resonator must be designed. Creativity is very important in resonator design. It must be small and novel to get a better device than previous works. Therefore, the layout of previous reported resonator, used in passive microstrip devices, are studied in this work. There is a fierce competition among designers to miniaturize and increase the device performance. Hence we will investigate them, from the point of view size and performance, in this work. Some diplexers are multi-channel, which are more difficult to design than two-channel diplexers. Therefore, the multi-channel diplexers are less reported than the two-channel diplexers. The design of multiplexers is also very difficult because several channels must be controlled. Hence, they are less designed than filters and diplexers. The diplexers can be bandpass-bandpass or lowpass-bandpass, where the latest is less designed. This is because designing a lowpass-bandpass diplexer needs lowpass and bandpass resonators, whereas the design of a bandpass-bandpass diplexer needs only a bandpass resonator.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Review on the Structure, Application and Performance of the Passive Microstrip Devices

Rezaei

Yahya

2022

Cihan U Erbil SCI J

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“…Microstrip couplers are favorite devices due to their low cost, planar structure and easy to integrate. According to these, many RF couplers have been introduced using various microstrip structures [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. In [1] and [2] two compact microstrip branch line couplers have been designed for operating in 2.4 GHz and 5.7 GHz WLANs, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…The stubs are close together and fill the quadrangular space resulting in a complicated structure and hard fabrication. In [10] two ring resonators have been integrated to obtain three large microstrip branch line couplers with low performances where undesired coupling factor, isolation, return loss and insertion loss can be seen clearly. In [11] wide passband microstrip branch-line couplers have been designed by cascading several quadrangular loops, which take large implementation area.…”

Section: Introductionmentioning

confidence: 99%

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Microstrip Hybrid Coupler with a Wide Stop-Band Using Symmetric Structure for Wireless Applications

Rezaei

Noori

2018

J. Microw. Optoelectron. Electromagn. Appl.

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In this paper, a wide stop-band microstrip coupler is presented. The proposed structure consists of coupled lines and step impedance cells, which are integrated to operate at 2.82 GHz for wireless applications. This coupler is formed by a symmetric structure so that the locations of the output ports relative to input are quite similar. Accordingly, the magnitudes (also phases) of S 21 and S 31 overlap each other so that input signal can be selected through the output ports equally. There are little differences between the magnitudes and phases of S 21 and S 31 so that 0.97˚ phase shift is obtained. In comparison with previous works, the performance of the introduced coupler is improved. To get a better isolation, return loss and harmonic attenuation the frequency response is optimized without significant increase in circuit size. Moreover, the first, second and third harmonics of S 21 and S 31 are well attenuated as well as a wide stop-band is obtained up to 15.1 GHz. The realized coupler is fabricated and measured. There is a good agreement between simulated and measured results, which confirms the design process.

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Planar Branch-Line Coupler for 5G Communication

Samanta,

Chakravorty,

Bose

et al. 2024

Studies in Autonomic, Data-Driven and Industrial Computing

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Enhanced Design of Two-Section Microstrip-Slot Branch Line Coupler with the Overlapped λ/4 Open Circuited Lines at Ports

Cited by 13 publications

References 8 publications

A Review on the Structure, Application and Performance of the Passive Microstrip Devices

A Review on the Structure, Application and Performance of the Passive Microstrip Devices

Microstrip Hybrid Coupler with a Wide Stop-Band Using Symmetric Structure for Wireless Applications

Planar Branch-Line Coupler for 5G Communication

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