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Proceedings ArticleDOI

A dual band reconfigurable 64th mode SIW-inspired antenna

TL;DR: In this article, a low profile dual-band reconfigurable antenna has been developed and discussed and the basic structure is derived from a circular SIW cavity which has been segmented along the quasi-magnetic walls to form the 64th mode SIW.
Abstract: A compact low profile dual band reconfigurable antenna has been developed and discussed. The basic structure is derived from a circular SIW cavitywhich has been segmented along the quasi-magnetic walls to form the 64th Mode SIW. The ground plane has been engineered to obtain quasi-omnidirectional radiation pattern. The end-wall is shorted by metallic vias. Two locations on the antenna structure have been shorted by PIN diodeswith suitable bias voltages. Dual mode operation at two different frequency bands has been successfully demonstrated.
References
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Journal ArticleDOI
TL;DR: In this paper, the authors proposed a quarter-mode substrate integrated waveguide (QMSIW) which is the quadrant sector of a square waveguide resonator and investigated its performance with TE101 and TE202 modes.
Abstract: A quarter-mode substrate integrated waveguide (QMSIW) which is the quadrant sector of a square waveguide resonator is proposed and investigated in this paper. The QMSIW is realized by bisecting the half-mode substrate integrated waveguide (HMSIW) into two parts along the fictitious quasi-magnetic wall when it operates with TE101 and TE202 modes as the way bisecting the substrate integrated waveguide (SIW) to HMSIW. The QMSIW can almost preserve the field distribution of original SIW and leaky wave is achieved from the dielectric aperture of the QMSIW. When the feeding port is placed at one corner of the QMSIW, a linearly polarized radiation is obtained when the QMSIW resonates in TE101QM mode, and when the QMSIW resonates in TE202QM mode, a circularly polarized (CP) wave is achieved. An antenna is designed, fabricated, and measured based on the proposed QMSIW. The measurement results match with the simulation results very well.

197 citations


"A dual band reconfigurable 64th mod..." refers background or methods in this paper

  • ...As [4]—[6] had considered a rectangular SIW cavity, so they were limited to Eighth- Mode beyond which they could not be segregated....

    [...]

  • ...Jin et al [4] successfully demonstrated the concept of Quarter Mode SIW as a radiator, in which the rectangular SIW geometry was segregated along the fictitious quasi-magnetic wall, while maintaining its frequency of resonance....

    [...]

Journal ArticleDOI
TL;DR: In this paper, a frequency reconfigurable microstrip patch switchable to slot antenna is proposed, which is capable of frequency switching at nine different frequency bands between 1.98 and 3.59 GHz.
Abstract: A frequency-reconfigurable microstrip patch switchable to slot antenna is proposed. The antenna is capable of frequency switching at nine different frequency bands between 1.98 and 3.59 GHz. The patch is resonating at 3.59 GHz, while the slot produces eight different operating frequencies between 1.98 and 3.41 GHz. Five RF p-i-n diode switches are positioned in the slot to achieve frequency reconfigurability. Simulated and measured results are used to demonstrate the performance of the antenna. The simulated and measured return losses, together with the radiation patterns, are presented.

159 citations

Journal ArticleDOI
TL;DR: In this article, a microstrip dual-band polarization reconfigurable antenna is presented for wireless local area network (WLAN) systems operating at 2.4 and 5.8 GHz.
Abstract: A new microstrip dual-band polarization reconfigurable antenna is presented for wireless local area network (WLAN) systems operating at 2.4 and 5.8 GHz. The antenna consists of a square microstrip patch that is aperture coupled to a microstrip line located along the diagonal line of the patch. The dual-band operation is realized by employing the TM10 and TM30 modes of the patch antenna. Four shorting posts are inserted into the patch to adjust the frequency ratio of the two modes. The center of each edge of the patch is connected to ground via a PIN diode for polarization switching. By switching between the different states of PIN diodes, the proposed antenna can radiate either horizontal, vertical, or 45° linear polarization in the two frequency bands. Measured results on reflection coefficients and radiation patterns agree well with numerical simulations.

92 citations

Journal ArticleDOI
TL;DR: In this article, the authors proposed an eight-mode substrate-integrated waveguide (EMSIW) and a complementary split-ring resonator (CSRR) to achieve a forward electromagnetic wave with frequency below the characteristic waveguide cuff-off frequency.
Abstract: Electrically small antennas are proposed, based on a substrate-integrated waveguide (SIW) and a complementary split-ring resonator (CSRR). The antenna's electrical size is reduced by introducing both CSRR and the eight-mode substrate-integrated wave guide (EMSIW). A forward electromagnetic wave can be achieved with frequency below the characteristic waveguide cuff-off frequency due to the CSRR. The EMSIW occupies only 12.5% of the conventional SIW with the same dominant resonant frequency. In addition, by rotating the CSRR on the EMSIW, the resonant frequency of the antenna is varied, while maintaining the same radiation pattern and performance. The S-parameters and radiation patterns are investigated by a full-wave simulation and measurement. The resonant frequency is changed from 4.74 GHz to 5.07 GHz by varying the orientation of the CSRR from 0 to 360 degrees. Omnidirectional radiation patterns are observed, and the measured peak gains are 4.5-5.9 dBi.

72 citations

Journal ArticleDOI
TL;DR: In this article, an electrically small dual-band reconfigurable antenna is proposed, which is capable of dualband operation by additionally loading an electrical small complementary split-ring resonator structure.
Abstract: In this paper, we propose a novel electrically small dual-band reconfigurable antenna. By using a compact eighth-mode substrate integrated waveguide (EMSIW) structure, we designed a compact antenna. This antenna is capable of dual-band operation by additionally loading an electrically small complementary split-ring resonator (CSRR) structure. The EMSIW and CSRR structures are designed for satisfactory operations at bandwidths of 1.575 GHz [global positioning system (GPS)] and 2.4 GHz [wireless local area network (WLAN)], respectively. We load the CSRR with a varactor diode to achieve a narrow bandwidth and to enable the resonant frequency to continuously vary from 2.4 GHz to 2.5 GHz. Thus, we realize a channel selection function, which is used according to WLAN standards. Irrespective of the variation in the varactor diode voltage, the resonant frequency of the EMSIW is not varied, such that the antenna maintains a constant frequency at the GPS bandwidth even at different voltages. Consequently, as the DC bias voltage varies from 11.4 V to 30 V, the resonant frequency at the WLAN bandwidth continuously varies between 2.38 GHz and 2.5 GHz. We observe that the simulated and measured s-parameter values and radiation patterns are in good agreement with each other.

41 citations


"A dual band reconfigurable 64th mod..." refers methods in this paper

  • ...As [4]—[6] had considered a rectangular SIW cavity, so they were limited to Eighth- Mode beyond which they could not be segregated....

    [...]

  • ...Lim et al could successfully segregate upto the Eighth- Mode [5] and also develop a reconfigurable design on the Eighth- Mode geometry by the use of varactor diodes [6]....

    [...]