Novel microstrip quadruplexer with wide stopband for <scp>W</scp>i<scp>MAX</scp> applications

Rezaei, Abbas; Noori, Leila

doi:10.1002/mop.31187

Cited by 10 publications

(5 citation statements)

References 11 publications

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“…Three different structures of microstrip quadruplexers with their frequency responses are presented in Table 6. In, [31] engraved semicircular cells have been coupled to each other, where similar to the other quadruplexers, it has five ports and four channel. It operates at 3.211, 3.276, 3.38, and 3.491 GHz for IEEE 802.16 WiMAX applications.…”

Section: Structures Performance and Applications Of Multiplexersmentioning

confidence: 99%

“…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.…”

Section: Introductionmentioning

confidence: 99%

“…Quadruplexers are types of multiplexers with five ports and four passbands. [31][32][33][34][35][36][37] In, [32] in addition to the quadruplexer, a five channel multiplexer is designed. Despite of having close channels, a high isolation between channels is obtained, [34] which is a great achievement.…”

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: Structures Performance and Applications Of Multiplexersmentioning

confidence: 99%

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 devices such as filters, diplexers, multiplexers, and couplers with high performance and compact size are widely demanded by the modern wireless communication systems [1][2][3][4]. A specific type of diplexers is a diplexer with two lowpass and bandpass channels.…”

Section: Introductionmentioning

confidence: 99%

Design of a high–performance lowpass–bandpass diplexer using a novel microstrip structure for GSM and WiMAX applications

Hayati

Rezaei

Noori

2019

IET Circuits, Devices & Systems

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In this work, a lowpass-bandpass diplexer is proposed based on a novel microstrip structure. This diplexer includes two lowpass and bandpass filters integrated by a simple transmission line. The lowpass channel has a cutoff frequency at 1.88 GHz, which makes it suitable for GSM applications. The resonance frequency of the bandpass channel is 3.56 GHz for IEEE 802.16 WiMAX applications. In comparison with the previously reported lowpass-bandpass diplexers, the proposed design has the lowest insertion and return losses at both channels while it occupies the most compact implementation area of 0.03 λg 2. The designed diplexer can suppress the harmonics up to 4.45F C with a maximum harmonic level of −20 dB, where F C is the cutoff frequency of the lowpass channel. The lowpass channel has a very sharp roll-off of ξ = 220, while the bandpass channel has a high selectivity with a high fractional bandwidth of 23.8%. To verify the design method and simulation results, the designed diplexer is fabricated and measured. The simulated and measured results are in a good agreement.

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“…Multi-channel microstrip devices such as multiplexers [1,2] and multi-channel diplexers [3,4] are strongly demanded by modern multi-channel communication systems. They have been utilised to select desired signals among crowded frequency bands.…”

Section: Introductionmentioning

confidence: 99%

A Compact Microstrip Triplexer With a Novel Structure Using Patch and Spiral Cells for Wireless Communication Applications

Rezaei¹,

Yahya²,

Moradi³

et al. 2019

PIER Letters

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In this work, a novel planar four-port microstrip triplexer is designed and analyzed to operate at 1.9 GHz, 2.5 GHz, and 3.35 GHz for wireless communication applications. The proposed structure consists of a compact patch and spiral cells. The main advantage of this triplexer is its very compact size, with a cross size of only 15 mm × 15 mm (0.017λ 2 g). Sharp frequency response at the edges of all passbands, low insertion losses (0.25 dB, 0.4 dB and 0.11 dB), and high return losses (45 dB, 54 dB and 40 dB) in all channels are the other advantages of the designed triplexer. Additionally, the triplexer has reasonable isolations (S 23 , S 24 , S 34), better than 20 dB. To verify the design method, both EM simulation and measurement results are obtained. The comparison shows that the measured and simulated results are in good agreement, which proves the feasibility of this work.

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Novel microstrip quadruplexer with wide stopband for WiMAX applications

Cited by 10 publications

References 11 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

Design of a high–performance lowpass–bandpass diplexer using a novel microstrip structure for GSM and WiMAX applications

A Compact Microstrip Triplexer With a Novel Structure Using Patch and Spiral Cells for Wireless Communication Applications

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