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Zheng L.,Air Defence and Anti Missile Institution | Wang G.,Air Defence and Anti Missile Institution | Geng L.,Air Defence and Anti Missile Institution | Hu Y.,Air Defence and Anti Missile Institution
Progress In Electromagnetics Research C | Year: 2013

A compact waveguide (CPW)-fed dual-frequency planar monopole antenna is proposed, which can excite two modes. The antenna is composed of a epsilon negative (ENG) meta-structured transmission line (MTL) unit cell and a monopole. The first resonance is zeroth-order mode, which is described using dispersion relation of ENG MTL based on Bloch and Floquet and designed on a CPW single layer where vias are not required. And the second is electromagnetically coupled monopolar mode. The zeroth-order resonant phenomenon is employed to reduce the antenna size. To design and analyze the proposed antenna, the circuit simulation of the ENG MTL unit resonator is executed by the equivalent circuit, and the results are compared with those of full wave simulation and experiment. The results show that the presented antenna has a reasonable radiation characteristics of bandwidth gain and size, verified by a commercial EM simulation software HFSS11, and is suitable for compact dual-frequency antenna. Then the antenna is fabricated and measured. The realized antenna has a compact size of 0.288λ0 ×0.199λ0 ×0.011λ0 (25.1 mm×17.4 mm×1 mm) at 2.43GHz. Simulated and experimentally measured results show that the proposed antenna can operate at 2.41 (2.43) GHz and 4.11 (4.14) GHz bands, respectively. Good agreement between the simulated and measured results is obtained. Source


Hu Y.,Air Defence and Anti Missile Institution | Zhang X.,Air Defence and Anti Missile Institution | Long Z.,Air Defence and Anti Missile Institution | Chao Z.,Air Defence and Anti Missile Institution
2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference, CSQRWC 2013 | Year: 2013

This paper presents the design and analysis of compact coplanar waveguide (CPW)-fed dual-frequency resonant antenna. It can be analyzed and designed on the concept of the epsilon negative (ENG) meta-structured transmission line (MTL) and on a CPW single layer where vias are not required. The resonant phenomenon is employed to reduce the antenna size. To design and analyze the proposed antenna, the circuit simulation of the ENG MTL unit resonator is executed by the equivalent circuit and the results are compared with those of full wave simulation and experiment. The results show that the presented antenna has such a reasonable radiation characteristics of bandwidth and size which are verified by commercial EM simulation software HFSS11 and is suitable for compact dual-frequency antenna. Then the antenna is fabricated and measured. The realized antenna has a compact size of 22 mm×26.6 mm. Experimental results show that the proposed antenna can operate at 2.5 (2.485 to 2.515) GHz and 4.20 (4.075 to 4.327)GHz bands. Good agreement between the simulated and measured results is obtained. © 2013 IEEE. Source


Long Z.,Air Defence and Anti Missile Institution | Guangming W.,Air Defence and Anti Missile Institution | Yajun H.,Air Defence and Anti Missile Institution | Zhao Z.,Air Defence and Anti Missile Institution
Microwave and Optical Technology Letters | Year: 2013

In this article, a coplanar waveguide -fed miniaturization folded-slot antenna for wireless local area network application is proposed. The two operating bands are achieved by folded-slot antenna with slot loading. The parametric analysis of the antenna is done by the available electromagnetic solver HFSS11. The proposed antenna is developed, and its measured characteristics are in good agreement with the simulated results. The measured impedance bandwidth for 10-dB return loss at 2.4 and 5.5 GHz operating band are 90 MHz (2.40-2.49 GHz) and 950 MHz (5.1-6.05 GHz), respectively. Furthermore, the antenna has a simple planar structure and occupies a small size of about 28 × 30 mm2. The antenna also shows good radiation and stable antenna gains across the operating band. © 2013 Wiley Periodicals, Inc. Source

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