Monopole-Like and Boresight Pattern Reconfigurable Antenna

Lim, Inseop; Lim, Sungjoon

doi:10.1109/tap.2013.2283926

Cited by 122 publications

(42 citation statements)

References 11 publications

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“…One way to achieve the dual radiation modes is to use reconfigurable antennas. Antennas, being able to switch between monopolar mode and patch mode, have been investigated . For example, a dual mode single band flexible textile antenna has been studied in Reference with two radiating structures: the ring for on body mode and the patch for off body mode.…”

Section: Introductionmentioning

confidence: 99%

Design of a dual band dual mode antenna for on/off body communications

Zhao

Geyi

2019

Micro & Optical Tech Letters

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A dual band dual mode patch antenna for on/off body communications is proposed in this letter. The antenna operates at 2.45 and 5.8 GHz with different radiation modes. The radiation pattern is omnidirectional at the lower frequency band while directional in the broadside at the higher frequency band. Through introducing a ground plane below the radiating patch, the influence of the human body on the performance of the proposed antenna is minimized and the specific absorption rate value is significantly reduced and is much lower than the standard limit value.

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Section: Introductionmentioning

confidence: 99%

Design of a dual band dual mode antenna for on/off body communications

Zhao

Geyi

2019

Micro & Optical Tech Letters

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“…Reconfigurable antennas provide a solution. There are some reconfigurable techniques, that is, the electrical reconfiguration using the PIN diodes or varactors, using the tunable materials such as liquid crystal and mechanically reconfiguration . However, the efficiencies of the reconfigurable antennas using the electronic devices are usually low, compared to that of the mechanically reconfigurable antenna.…”

Section: Introductionmentioning

confidence: 99%

Mechanically pattern reconfigurable dual‐band antenna with omnidirectional/directional pattern for 2.4/5GHz WLAN application

You

Yuan

et al. 2017

Micro & Optical Tech Letters

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A mechanically pattern reconfigurable dual‐band antenna with an omnidirectional radiation pattern or a directional pattern for 2.4/5GHz dual‐band WLAN application is presented. By manually rotating the top substrate, the antenna can operate at patch state or monopole state, respectively. A novel U‐gap structure consisting of an outer patch, an inner patch and a U‐shaped gap is introduced to achieve the dual band feature at both operation states. The measured overlapped bands of the two states are 2.4–2.56 GHz and 5.22–6 GHz, covering the 2.4–2.48 GHz and most of the 5.15–5.85 GHz WLAN band. The measured peak gain is 2.4 dBi at 2.5GHz, 6.2 dBi at 5.5 GHz for monopole state, and 5.8 dBi at 2.5 GHz, 7.2 dBi at 5.5 GHz for patch state.

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“…To overcome this problem, reconfigurable antennas have been proposed. They offer pattern and frequency diversity by selectively incorporating with a different feeding/antenna pair using electrical switches [5,6]. But still, difficulties in fabrication remain due to bias lines for turning on/off the switches.…”

Section: Introductionmentioning

confidence: 99%

Hilbert Curve Fractal Antenna for Dual on- And Off-Body Communication

Saputro¹,

Chung²

2016

PIER Letters

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Abstract-We present a Hilbert curve fractal antenna operating at 2.45 GHz ISM and 5.5 GHz WLAN bands. The proposed antenna employs a third-order Hilbert curve and two shorting vias for antenna miniaturization and dual-band/mode operation. At 2.45 GHz, the antenna exhibits a monopole-like radiation pattern, while at 5.5 GHz, it provides a broadside radiation pattern, suitable for simultaneous on-and off-body communication using two distinct frequency bands. The antenna footprint is as small as 25.5 mm × 25.5 mm. Simulation and measurement results demonstrate that the antenna gain is more than 1.9 dBi if the antenna is mounted on a ground larger than 40 mm × 40 mm. The effect of human body presence on antenna performance was investigated by means of full-wave simulations locating the antenna on a human body phantom. It is shown that the proposed antenna is capable of maintaining its free-space performance over the human body phantom except for the gain reduction of 2.5 dBi at 5.5 GHz band.

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Monopole-Like and Boresight Pattern Reconfigurable Antenna

Cited by 122 publications

References 11 publications

Design of a dual band dual mode antenna for on/off body communications

Design of a dual band dual mode antenna for on/off body communications

Mechanically pattern reconfigurable dual‐band antenna with omnidirectional/directional pattern for 2.4/5GHz WLAN application

Hilbert Curve Fractal Antenna for Dual on- And Off-Body Communication

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