Compact microstrip diplexer using new design of triangular open loop resonator for 4G wireless communication systems

Salehi, Mohammad Reza; Keyvan, Sina; Abiri, Ebrahim; Noori, Leila

doi:10.1016/j.aeue.2016.04.015

Cited by 33 publications

(36 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For this reason, the design and development of multiport systems including diplexer or triplexer are important. A diplexer can be designed in both bandpass‐bandpass (BP‐BP) and lowpass‐bandpass (LP‐BP) . In most telecommunication systems, such as mixers, low‐frequency signals and intermediate‐frequency signals need to be isolated from high‐frequency signals, and hence the LP‐BP diplexers are of great significance in this regard.…”

Section: Introductionmentioning

confidence: 99%

Design and fabrication of a compact microstrip lowpass-bandpass diplexer with high isolation for telecommunication applications

Moloudian

Dousti

2018

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

This study aimed to design and fabricate a lowpass‐bandpass (LP‐BP) diplexer with high isolation for telecommunication applications including wireless communications. The results revealed that the −3 dB cutoff frequency of the lowpass filter (LPF) was equal to 0.82 GHz. The advantages of the LPF section include a very high suppression factor (SF) parameter (about 4.4), very sharp roll‐off‐rate (ROF or ζ) parameter (687), and a very high figure of merit (FOM) (about 233491). The bandpass filter (BPF) section was designed applying dual‐mode resonators with triband. The central frequencies of these tribands were equal to 2.38, 3.93, and 5.65 GHz. In the following, an SMV‐1247‐079LF SMD varactor diode is used to adjust the proposed LPF. The tuning range for the proposed LPF is 0.3‐0.72 GHz. In the proposed diplexer, the isolation between the output ports was higher than 45 dB. The results of measurements were in good agreement with those of the simulation.

show abstract

Section: Introductionmentioning

confidence: 99%

Design and fabrication of a compact microstrip lowpass-bandpass diplexer with high isolation for telecommunication applications

Moloudian

Dousti

2018

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

show abstract

“…High‐performance microstrip diplexers, triplexers, and quadruplexers are widely demanded by multiservice communication systems to send and receive signals. Various types of microstrip diplexers, triplexers, and quadruplexers are reported recently. Coupled open loops in Refs.…”

Section: Introductionmentioning

confidence: 99%

Novel microstrip quadruplexer with wide stopband for WiMAX applications

Rezaei

Noori

2018

Micro & Optical Tech Letters

Self Cite

View full text Add to dashboard Cite

This work introduces a planar harmonic suppresser microstrip four‐channel multiplexer based on an originally novel geometrical structure. It consists of coupled lines connected to engraved semicircular cells. The realized quadruplexer operates at 3.211, 3.276, 3.38, and 3.491 GHz for IEEE 802.16 WiMAX. Wide stopbands above all passbands are obtained up to about 20 GHz so that fifth harmonics are attenuated properly. The semicircular structures provide quite close channels, which make it appropriate for FDD scheme. Compared to the previous reported quadruplexer, the common port return loss is decreased significantly, where improving the common port impedance matching for very close passbands is an important challenge. To minimize the circuit size, a new matching network consisting of coupled line and step impedance cell is embedded. To verify the designing methodology, the proposed multiplexer is fabricated and measured, where the simulated and measured results are in a good agreement.

show abstract

“…Therefore, various structures have been introduced to achieve the essentials of wireless devices such as low cost, compact size, high selectivity, and low insertion loss. However most of the earlier works could not reach an insertion losses better than −1 dB at two passbands . In the work by Chen et al, a microwave diplexer has been proposed, which is constructed of a microstrip dual‐mode ring resonator and half‐wavelength resonators.…”

Section: Introductionmentioning

confidence: 99%

“…They are composed of five and six resonators that occupy a large space. In the work by Salehi et al, two triangular open loop resonators have been combined in order to perform a narrow band diplexer for 4G wireless communication systems. The aim of this article is to design a microstrip diplexer based on a new combination of the coupled lines to decrease the insertion losses and tune two resonance frequencies with a significant size reduction.…”

Section: Introductionmentioning

confidence: 99%

“…However most of the earlier works could not reach an insertion losses better than 21 dB at two passbands. [1][2][3][4][5][6][7][8] In the work by Chen et al, 1 a microwave diplexer has been proposed, which is constructed of a microstrip dual-mode ring resonator and half-wavelength resonators. It has been analyzed to achieve a high isolation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design of a novel compact microstrip diplexer with low insertion loss

Rezaei

Noori

Mohammadi

2017

Micro & Optical Tech Letters

View full text Add to dashboard Cite

In this article, a microstrip diplexer is implemented based on a novel combination of the coupled lines and spiral structures in order to reduce the circuit size as well as insertion losses. This diplexer with an elliptic function frequency response operates at 2.4/2.79 GHz for wireless applications. Several transmission zeros on the both sides of two passbands are realized, which improve the selectivity. A theory method is presented that helps to miniaturization, control the resonance frequency, improve the insertion loss, and external quality factor simultaneously. The proposed diplexer has a compact size of 0.3λg × 0.25λg with low insertion losses of 0.18/0.39 dB at 2.4/2.79 GHz. The isolation between the two channels (S23) is better than 20.5 dB from DC up to 6 GHz. The designed diplexer is fabricated and measured. There is a good agreement between the simulated and measured results.

show abstract

Compact microstrip diplexer using new design of triangular open loop resonator for 4G wireless communication systems

Cited by 33 publications

References 16 publications

Design and fabrication of a compact microstrip lowpass-bandpass diplexer with high isolation for telecommunication applications

Design and fabrication of a compact microstrip lowpass-bandpass diplexer with high isolation for telecommunication applications

Novel microstrip quadruplexer with wide stopband for WiMAX applications

Design of a novel compact microstrip diplexer with low insertion loss

Contact Info

Product

Resources

About