Compact microstrip triplexer based on coupled stepped impedance resonators

Wu, Hung‐Wei; Huang, Shih-Hua

doi:10.1109/mwsym.2013.6697516

Cited by 11 publications

(16 citation statements)

References 8 publications

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“…Nevertheless, it has low selectivity with undesired common port return losses of 11.8 and 13.8 dB at the first and third passbands, respectively. According to the Table, miniaturization has been carried out in some of the previous works by victimization of the insertion loss [10][11][12][13] and return loss [10][11][12][13][14]. References [4,5,10,[12][13][14] have compact sizes but our work has better insertion losses, return losses, and frequency ratios.…”

Section: Resultsmentioning

confidence: 99%

“…Despite its large return loss and weak frequency selectivity, a significant reduction in the insertion losses could be seen. Although the low insertion loss at resonance frequency is an important issue, most of the reported triplexers could not reduce it [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. These triplexers have been designed using various microstrip structures.…”

Section: Introductionmentioning

confidence: 99%

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Novel low-loss microstrip triplexer using coupled lines and step impedance cells for 4G and WiMAX applications

Rezaei¹,

Noori²

2018

Turk J Elec Eng & Comp Sci

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Abstract:In this paper, a new microstrip triplexer with flexible resonance frequencies is designed based on the properties of coupled lines, steps, and spiral cells. It operates at 2.67 GHz for 4G LTE and at 3.1 GHz and 3.43 GHz for IEEE 802.16 WiMAX. The close resonance frequencies make it suitable for frequency division duplex applications. In order to improve insertion loss, the LC equivalent circuit of the proposed resonator is analyzed. Moreover, careful alignment of the coupled lines and step impedance structures is performed to improve the insertion and return losses so that they are 0.72/0.63/0.81 dB and 24.5/24/24.7 dB, respectively. The frequency response shows good selectivity for each channel.Meanwhile, there are several transmission zeros above the first channel and below the last one that improve the stopband properties. The proposed triplexer is fabricated and measured. The simulation and measurement results are in good agreement, which validates the introduced methodology.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel low-loss microstrip triplexer using coupled lines and step impedance cells for 4G and WiMAX applications

Rezaei¹,

Noori²

2018

Turk J Elec Eng & Comp Sci

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show abstract

“…Recently, compact and high-performance microstrip triplexers are highly attractive for multichannel wireless and mobile systems. Accordingly, several types of microstrip triplexers have been reported in [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. Their designs are based on various types of microstrip resonators.…”

Section: Introductionmentioning

confidence: 99%

“…A common triple-mode resonator in [6], coupled open loops and hairpins in [7], step impedance resonator, radial and coupled lines in [8], two coupled bumpy lines in [9], and coupled hairpins and spirals in [10] have been used to design microstrip triplexers. In [11,12], based on asymmetric split-ring resonators, two microstrip triplexers have been designed. Using coupled hairpins, coupled U-shape and T-shape cells, a lowpass-bandpass triplexer with good isolation has been proposed in [13].…”

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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“…For multiplexers, distributed coupling technique is widely used [5][6][7][8]. By properly locating the channels along the distributed common feed line, a good impedance matching in each channel can be gained, and isolation obtained can also meet the requirement sometimes.…”

Section: Introductionmentioning

confidence: 99%

Wide Stopband Compact Microstrip Quadruplexer Using Common Crossed Resonator

Qian¹,

Chen²

2018

PIER Letters

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A compact size and wide stopband microstrip quadruplexer with a common crossed resonator is proposed in this paper. The resonator mentioned is theoretically analyzed and proved to be able to resonate at three different frequencies. The resonant frequencies can be easily modified by changing the length of the corresponding stub of the resonator. This tri-mode resonator is proved to have the capacity of being shared by three different bandpass filters in a quadruplexer in this paper. Then an additional channel is designed to be coupled to the other side of the feed line of the common input port. Compared to conventional ones, the proposed quadruplexer has a more compact structure, since no extra matching network is needed, and the number of resonators is reduced effectively. Moreover, a wide stopband is obtained by making the resonators work at the same fundamental frequencies but different higher order frequencies. Besides, open circuit stubs are also used to suppress the harmonic frequencies. To demonstrate the design procedure, a quadruplexer with a third order Chebyshev response in each channel is fabricated and measured. The measured result is in good agreement with the simulated one, showing an attenuation of 20 dB up to 10.2 times of the first channel frequency.

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Compact microstrip triplexer based on coupled stepped impedance resonators

Cited by 11 publications

References 8 publications

Novel low-loss microstrip triplexer using coupled lines and step impedance cells for 4G and WiMAX applications

Novel low-loss microstrip triplexer using coupled lines and step impedance cells for 4G and WiMAX applications

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

Wide Stopband Compact Microstrip Quadruplexer Using Common Crossed Resonator

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