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Yang Gao

Bio: Yang Gao is an academic researcher from Tsinghua University. The author has contributed to research in topics: Dielectric resonator antenna & Antenna efficiency. The author has an hindex of 5, co-authored 10 publications receiving 171 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, a compact dielectric resonator antenna (DRA) for broadband applications is proposed by applying an optimized asymmetrical T-shaped DRA and an inverted-trapezoidal patch as a feeding mechanism, achieving an impedance bandwidth of about 75.1% covering the frequency range from 3.81 to 8.39 GHz.
Abstract: A compact dielectric resonator antenna (DRA) for broadband applications is proposed. By applying an optimized asymmetrical T-shaped dielectric resonator (DR) and an inverted-trapezoidal patch as a feeding mechanism, an impedance bandwidth of about 75.1%, covering the frequency range from 3.81 to 8.39 GHz, is obtained. The volume of the proposed DRA without ground plane is 0.555 λd3 (λd is the dielectric wavelength at the central operating frequency). Taking a comprehensive consideration of the bandwidth and the size, the proposed DRA can provide maximum bandwidth per unit volume in related conformal patch excited wideband DRA designs. Design details of the proposed antenna and the results of both simulation and experiment are presented and discussed.

87 citations

Journal ArticleDOI
TL;DR: In this paper, a compact dual-polarized dielectric resonator antenna (DRA) fed by a coplanar waveguide (CPW) is presented, which adopts the even and odd modes of a CPW structure, two orthogonal polarizations with good isolation can be excited in the rectangular DRA by a single feeding aperture.
Abstract: A compact dual-polarized dielectric resonator antenna (DRA) fed by a coplanar waveguide (CPW) is presented. By adopting the even and odd modes of a CPW structure, two orthogonal polarizations with good isolation can be excited in the rectangular DRA by a single feeding aperture. The measured 10-dB impedance bandwidths of the two polarizations are 260 (7%) and 440 MHz (11.6%), respectively. Over the operating bandwidth, the measured isolation between two ports is better than 25 dB. A prototype was fabricated and tested. Good agreement between the measured and simulated results is obtained.

74 citations

Journal ArticleDOI
TL;DR: In this paper, a rectangular dielectric-metal strip composite resonator antenna with TExδ01 mode is introduced, which has an impedance bandwidth of 85 MHz at 3.5 GHz and a gain of about 5.72 dBi.
Abstract: A rectangular dielectric-metal strip composite resonator antenna with TExδ01 mode is introduced. The value of 6 approaches zero for a dielectric with high permittivity. The TExδ01 mode has been explored with the possibility of a radiating mode in the hybrid dielectric-air resonator antenna with good radiation efficiency and broadside pattern. Owing to special electric field distributions, the resonant frequency of the TExδ01 mode is mainly determined by the dimension along the z-axis and relatively stable regardless of changes in length along y-axis. The proposed antenna has an impedance bandwidth of 85 MHz at 3.5 GHz and a gain of about 5.72 dBi. A prototype is fabricated and measured. Measured and simulated results show high accordance.

14 citations

Journal ArticleDOI
TL;DR: In this article, the authors proposed the TE $δδ 1/δ δ 1 /δ √ 1/γ 2/γ 3/γ 4/γ 5/γ 6/γ 7/γ 8/γ 9/γ 10/γ 11/γ 12/γ 13/γ 14/γ 15/γ 16/γ 17/γ 18/γ 19/γ 20/γ 21/γ 22/γ 23/γ 24/γ 25/γ 28/γ 30/γ 31/γ 32/γ 34/
Abstract: The TE $_{\delta 01}^{x}$ mode excited in a rectangular dielectric resonator antenna (DRA) with metal coating is presented. This mode was first proposed in a hybrid DRA in our previous work. To compare it to the traditional dominant mode and further show its characteristics, a set of simple rectangular DRAs with and without metal coating was designed, fabricated, and measured in this letter. These DRAs are mounted on the ground plane and fed by a coupling slot. Due to specific field distributions, the TE $_{\delta 01}^{x}$ mode can work at a much lower frequency than the traditional one in the rectangular DRA with the same dimensions. In addition, broadside radiation pattern and good radiation efficiency over the operating bandwidth are also obtained.

8 citations

Proceedings ArticleDOI
05 May 2012
TL;DR: In this paper, a high-gain silicon based on-chip dielectric resonator antenna operating at 60GHz that can be fabricated with standard CMOS technology is proposed, where both the dominant mode and one high-order mode are excited in the rectangular DRA realizing broadband characteristic.
Abstract: A high-gain silicon based on-chip dielectric resonator antenna operating at 60GHz that can be fabricated with standard CMOS technology is proposed. Both the dominant mode and one high-order mode are excited in the rectangular DRA realizing broadband characteristic. The simulated impedance bandwidth is about 17.3% (54.9–65.3GHz), covering the 7GHz band license-free around 60GHz. The proposed antenna also achieved a gain of over 0dBi from 56.8 to 65.3GHz, meeting fundamental requirement in the entire 60GHz frequency band. The peak gain at 60GHz and two resonant nulls are 3.7, 3.3 and 1.6dBi, respectively. Since only the top metal layer is utilized in the structure, the proposed antenna is easy to design and fabricate.

5 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, a CPW slot loop fed Minkowski shaped fractal dielectric resonator antenna is proposed to bring higher order modes close together to realize a wide impedance bandwidth.
Abstract: A CPW slot loop fed Minkowski shaped fractal dielectric resonator antenna is proposed. Self similar property of fractal geometry is utilized to bring higher order modes close together to realize a wide impedance bandwidth. A comparative study of the resonant frequency behavior between the well established fractal electrical boundary antennas and fractal magnetic boundary antennas is presented to provide insight into the functionality of the proposed antenna. The comparison highlights the fact that electrical boundary lowers resonance frequency, whereas fractal magnetic boundary increases the resonant frequency. Minkowski fractal is also compared with Koch fractal and Sierpinski curve geometries. It is observed that the Minkowski fractal DRA yields the widest impedance bandwidth along with stable gain amongst the three proposed geometries. The proposed antenna exhibits a fractional bandwidth of 64% (5.52 -10.72 GHz) and a maximum gain of 4.9 dBi.

124 citations

Journal ArticleDOI
TL;DR: In this paper, a new compact omnidirectional circularly polarized (CP) cylindrical dielectric resonator antenna (DRA) with a toploaded modified Alford loop is investigated.
Abstract: A new compact omnidirectional circularly polarized (CP) cylindrical dielectric resonator antenna (DRA) with a top-loaded modified Alford loop is investigated. Fed by an axial probe, the DRA is excited in its TM01δ-mode, which radiates like a vertically polarized electric monopole. The modified Alford loop comprises a central circular patch and four curved branches. It is placed on the top of the DRA and provides an equivalent horizontally polarized magnetic dipole mode. Omnidirectional CP fields can be obtained when the two orthogonally polarized fields are equal in amplitude but different in phase by 90°. This CP DRA is applied to the design of a two-port CP diversity DRA which provides omnidirectional and broadside radiation patterns. The broadside radiation pattern is obtained by making use of the broadside HEM12δ+ 1-mode of the DRA, which is excited by a balanced slot serially fed by a microstrip line. For demonstration, both the omnidirectional CP DRA and the diversity CP DRA were designed at ~ 2.4 GHz for WLAN applications. Their S-parameters, axial ratios, radiation patterns, antenna gains, and antenna efficiencies are studied. The envelope correlation is also found for the diversity design. Reasonable agreement between the simulated and measured results is observed.

120 citations

Journal ArticleDOI
TL;DR: In this paper, a comprehensive review concerning the geometry, the manufacturing technologies, the materials, and the numerical techniques, adopted for the analysis and design of wideband and ultrawideband (UWB) antennas for wireless applications, is presented.
Abstract: A comprehensive review concerning the geometry, the manufacturing technologies, the materials, and the numerical techniques, adopted for the analysis and design of wideband and ultrawideband (UWB) antennas for wireless applications, is presented. Planar, printed, dielectric, and wearable antennas, achievable on laminate (rigid and flexible), and textile dielectric substrates are taken into account. The performances of small, low-profile, and dielectric resonator antennas are illustrated paying particular attention to the application areas concerning portable devices (mobile phones, tablets, glasses, laptops, wearable computers, etc.) and radio base stations. This information provides a guidance to the selection of the different antenna geometries in terms of bandwidth, gain, field polarization, time-domain response, dimensions, and materials useful for their realization and integration in modern communication systems.

106 citations

Journal ArticleDOI
TL;DR: In this article, dual-band and wideband designs of dual-polarized cylindrical dielectric resonator antennas (DRAs) are investigated for DCS (1.71-1.88 GHz) and WLAN (2.4-2.48 GHz) bands.
Abstract: This letter investigates dual-band and wideband designs of dual-polarized cylindrical dielectric resonator antennas (DRAs). These designs make use of the fundamental HEM111 mode and higher-order HEM113 mode of the DRA. The strip- and slot-fed excitation methods are used for Ports 1 and 2 of the antennas, respectively. For demonstration, a dual-band dual-polarized DRA for DCS (1.71-1.88 GHz) and WLAN (2.4-2.48 GHz) bands and a wideband version that covers the 2.4-GHz WLAN band were designed. The S-parameters, radiation patterns, antenna gains, antenna efficiencies, and envelope correlations of the two designs are studied. It was found that the dual-band and wideband designs have port isolations of higher than 36 and 37 dB, respectively. Good agreement between the measured and simulated results is observed.

103 citations

Journal ArticleDOI
TL;DR: In this article, a multiple-input-multiple-output (MIMO) rectangular dielectric resonator antenna (RDRA) for 2.6 GHz Long Term Evolution (LTE) applications is investigated and presented.
Abstract: A multiple-input-multiple-output (MIMO) rectangular dielectric resonator antenna (RDRA) for 2.6-GHz Long Term Evolution (LTE) applications is investigated and presented. Two orthogonal modes of the RDRA are excited by using two different feed mechanisms: coplanar waveguide (CPW) and coaxial probe. The measured impedance bandwidth for port 1 and port 2 is 47% (2.09-3.38 GHz) and 25% (2.40-3.09 GHz), respectively. The measured correlation coefficient is 0.03 with nearly 10 dB diversity gain at frequency 2.6 GHz. The MIMO RDRA gives isolation of above 20 dB over the operating frequency. The gain of 4.97 dBi is obtained for port 1 and 4.51 dBi for port 2 at 2.6 GHz. The S-parameters, isolation, gain, correlation coefficient, and diversity gain of the MIMO RDRA are studied, and reasonable agreement between the measured and simulated results is observed .

91 citations