Journal ArticleDOI
Dual-Band Monopole Antenna With Frequency-Tunable Feature for WiMAX Applications
TLDR
In this article, a planar dual-band monopole antenna with a frequency-tunable band is presented, where a simple and novel biasing circuit, consisting of two radio frequency (RF) choke resistors and an L-shaped stub, is designed for biasing the varactor.Abstract:
A planar dual-band monopole antenna with a frequency-tunable band is presented. The structure of the antenna radiator has a stem connecting to two branches that are used to generate two frequency bands at around 2.4 and 3.4 GHz for Worldwide Interoperability for Microwave Access (WiMAX) applications. The lower band covers the WiMAX frequency band of 2.3–2.4 GHz, while the higher band is frequency-tunable to the WiMAX frequency bands of 3.3–3.4, 3.4–3.6and 3.6–3.8 GHz. The frequency tunability is achieved by using the reverse-bias voltage across a varactor that is placed between the stem and one of the radiating branches of the radiator. In this study, the radiating branch responsible for the higher band is selected for tuning. A simple and novel biasing circuit, consisting of two radio frequency (RF) choke resistors and an L-shaped stub, is designed for biasing the varactor. Results show that the higher band can be continuously tuned in frequency, yet keeping the lower band unchanged. The reflection coefficient, radiation pattern, and efficiency of the antenna are studied using computer simulation and measurement.read more
Citations
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Journal ArticleDOI
A Multiband Slot Antenna for GPS/WiMAX/WLAN Systems
TL;DR: In this paper, the design of a four-band slot antenna for the global positioning system (GPS), worldwide interoperability for microwave access (WiMAX), and wireless area network (WLAN) is presented.
Journal ArticleDOI
Frequency-Reconfigurable Antenna Using Metasurface
TL;DR: In this paper, a frequency-reconfigurable antenna designed using metasurface (MS) to operate at around 5 GHz is proposed and studied. But the MS placed atop the patch antenna behaves like a dielectric substrate and rotating the MS changes the equivalent relative permittivity of the substrate and hence the operating frequency of the FRMS antenna.
Journal ArticleDOI
Multi-Band RF Planar Sensor Using Complementary Split Ring Resonator for Testing of Dielectric Materials
TL;DR: In this paper, a multi-band RF planar sensor is proposed for non-destructive testing of dispersive materials, which is based on a number of complementary split ring resonator (CSRR) unit cells etched in the ground plane of the microstrip line.
Journal ArticleDOI
Mechanically pattern reconfigurable antenna using metasurface
TL;DR: In this article, a radiation pattern reconfigurable antenna designed using metasurface (MS) is proposed, which is composed of a planar semi-circular MS placed directly atop of the planar circular patch antenna with a diameter of 70 mm.
Journal ArticleDOI
Low-Pass Filter Based Integrated 5G Smartphone Antenna for Sub-6-GHz and mm-Wave Bands
TL;DR: In this paper, a triple-band antenna with a microstrip patch radiator with an inverted U-shaped slot for dual-band operation in the 28 and 38 GHz bands is proposed, where a meandered radiating structure is linked to the microstrip patches radiator through a compact microstrip resonant cell (CMRC) low-pass filter.
References
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Journal ArticleDOI
Frequency-reconfigurable antennas for multiradio wireless platforms
TL;DR: In this article, the authors explored the merits of using frequency-reconfigurable antennas as an alternative for multiband antennas and performed an analysis of various reconfigurable and multiband structures such as patches, wires, and combinations.
Journal ArticleDOI
A Reconfigurable Wideband and Multiband Antenna Using Dual-Patch Elements for Compact Wireless Devices
Hattan F. Abutarboush,Rajagopal Nilavalan,Sing Wai Cheung,Karim M. Nasr,T. Peter,Djuradj Budimir,Hamed S. Al-Raweshidy +6 more
TL;DR: In this article, a reconfigurable wideband and multiband C-slot patch antenna with dual-patch elements is proposed and studied, where two parallel C-Slots on the patch elements are employed to perturb the surface current paths for excitation of the dual-band and wideband modes.
Journal ArticleDOI
A Widely Tunable Compact Patch Antenna
TL;DR: In this paper, a tunable patch antenna made of a slotted rectangular patch loaded by a number of posts close to the patch edge is proposed, which is short circuited to the ground plane via a set of PIN diode switches.
Journal ArticleDOI
A Simple PIFA-Based Tunable Internal Antenna for Personal Communication Handsets
TL;DR: In this article, a planar inverted F antenna (PIFA)-based tunable internal antenna is proposed for personal communication handset applications, which can cover following frequency bands: DCS (1710-1880 MHz), PCS (1880-1990 MHz), UMTS (1900-2170 MHz), WiBro (2300-2390 MHz), WLAN (5.2 and 5.8 GHz), Bluetooth (2400-2480 MHz) and ISM band (2500-2700 MHz).
Journal ArticleDOI
Compact Printed Multiband Antenna With Independent Setting Suitable for Fixed and Reconfigurable Wireless Communication Systems
TL;DR: This paper presents the design of a low-profile compact printed antenna for fixed frequency and reconfigurable frequency bands, using computer simulation, and shows a good agreement between simulated and measured results.