A Tunable Dual-Fed Self-Diplexing Patch Antenna

Boukarkar, Abdelheq; Lin, Xian Qi; Jiang, Yuan; Yu, Yi

doi:10.1109/tap.2017.2689035

Cited by 45 publications

(29 citation statements)

References 15 publications

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“…This makes the ability of reconfigurability even more important for an RF front end. For a fully reconfigurable RF system, the core components in the system such as filter, power divider, and antenna should also be reconfigurable …”

Section: Introductionmentioning

confidence: 99%

“…For a fully reconfigurable RF system, the core components in the system such as filter, power divider, and antenna should also be reconfigurable. [3][4][5][6][7] Among the components, the hybrid coupler is considered to be one of the most important ones, as it provides the signals with desired amplitude and phase characteristics for the next module. To support different wireless communication standards, several approaches to achieve the tunability in operating frequency have been proposed in References 8-10.…”

Section: Introductionmentioning

confidence: 99%

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A phase tunable hybrid coupler with enhanced bandwidth

Zheng

Long

2019

Int J RF Microw Comput Aided Eng

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The majority of the previous works on tunable coupler concentrates on the tunability of the frequency and amplitude. The capability to control the phase characteristics draws little attention. However, the tunability in phase becomes more and more important, as the flexible control in phase affects the performance significantly in the modern wireless communication systems. Regarding this, several phase tunable couplers were proposed but with narrow bandwidth. In this article, a novel phase‐tunable coupler with enhanced bandwidth is proposed. It is constructed by introducing two varactor loaded coupled line sections between two branch line sections. By varying the capacitances loaded on and between the coupled lines, the continuously tunable phase difference can be achieved between two output ports without affecting the equal power division characteristics. The analysis of the ideal model and detailed circuit has been conducted to obtain the design formulas and guidelines. For demonstration, a phase tunable coupler operating at 1.8 GHz was designed, fabricated, and measured. It exhibits a tunable phase difference from 60° to 120° by varying the two biasing voltages. Meanwhile, the equal power division, good return loss, and high isolation are still maintained. The desired characteristics have been implemented over a wide bandwidth from 1.6 GHz to 2.0 GHz.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A phase tunable hybrid coupler with enhanced bandwidth

Zheng

Long

2019

Int J RF Microw Comput Aided Eng

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“…Various design techniques of self‐diplexing antennas are presented in literature . Different multilayered structures are reported, where either patches, printed at different layers, are excited by two separate ports or different layers with filtering structures are used to obtain better isolation .…”

Section: Introductionmentioning

confidence: 99%

“…As discussed earlier, a self‐diplexing antenna based on mode analysis technique is presented. Recently, few designs of single layered planar self‐diplexing antennas, based on substrate integrated waveguide (SIW), are reported …”

Section: Introductionmentioning

confidence: 99%

A self‐diplexing MIMO antenna for WLAN applications

Nandi

Mohan

2018

Micro & Optical Tech Letters

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This letter presents a slot‐based self‐diplexing MIMO (multiple‐input multiple‐output) antenna for dual‐band operation. In the first step, a self‐diplexing antenna is designed with two microstrip fed quarter wavelength slot‐antenna elements. Next, this self‐diplexing antenna is replicated to obtain the characteristics of a MIMO antenna. The designed self‐diplexing MIMO antenna with optimized dimensions operates at 5.1 GHz and 5.7 GHz. The peak gains obtained at two frequencies are 2.02 dBi and 2.96 dBi. Minimum isolation at both the operating bands is better than 15 dB. The proposed antenna offers a frequency ratio of 1‐1.62.

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“…With the rapid development of wireless communication, spectrum resources are getting scarce and the effective utilization of frequency resources becomes more and more important. To satisfy the systems with different frequencies regulations, a large number of tunable devices are proposed in wireless systems, such as tunable filters, tunable diplexers, and tunable antennas, [1][2][3][4] etc. As an indispensable device in the communication systems, diplexer has attracted extensive attention to adapt to the requirements of communication system.…”

Section: Introductionmentioning

confidence: 99%

High isolation tunable diplexer based on mixed electromagnetic coupling

Guan

Huang

Ren

et al. 2017

Int J RF Microw Comput Aided Eng

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In this article, a tunable diplexer based on quarter‐wavelength resonators with mixed electromagnetic coupling is designed. Different coupling types are utilized to generate a transmission zero in the stopband of filter, aiming to improve the isolation of diplexer. The meander line tunable filter with a magnetic dominated coupling forms channel 1 of the diplexer, a transmission zero in upper stopband is realized. The tunable filter dominated by electrical coupling constitutes channel 2 of the diplexer, a transmission zero is produced in lower stopband of the filter. Varactor diodes are loaded at quarter‐wavelength resonators for tunability of the center frequency. The proposed diplexer is both demonstrated by simulation and measurement. Experimental results show that the designed tunable diplexer has a frequency range of 0.85‐1.2 GHz and an isolation of greater than 42 dB.

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A Tunable Dual-Fed Self-Diplexing Patch Antenna

Cited by 45 publications

References 15 publications

A phase tunable hybrid coupler with enhanced bandwidth

A phase tunable hybrid coupler with enhanced bandwidth

A self‐diplexing MIMO antenna for WLAN applications

High isolation tunable diplexer based on mixed electromagnetic coupling

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