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Journal ArticleDOI

High-Efficient and High-Gain Superstrate Antenna for 60-GHz Indoor Communication

TL;DR: In this paper, a high-efficient and high-gain aperture coupled patch antenna with superstrate at 60 GHz was studied and presented, and it was shown that adding superstrate will result in a significant effect on the antenna performances, and the size of the superstrate is critical for the optimum performance.
Abstract: A high-efficient and high-gain aperture coupled patch antenna with superstrate at 60 GHz is studied and presented. It is noted that adding superstrate will result in a significant effect on the antenna performances, and the size of the superstrate is critical for the optimum performance. The maximum measured gain of a single antenna with superstrate is 14.6 dBi, which is higher than that of a classical 2 x 2 array. It is found that the gain measured of a single antenna with superstrate increases nearly 9 dB at 60 GHz over its basic patch antenna. This superstrate antenna gives a very high estimated efficiency of 76%. The 2:1 measured VSWR bandwidth with superstrate is 6.8%. The radiation patterns are found to be broadside all over the frequency band. Also, this letter explains a comparison to another source of parasitic patch superstrate antenna with normal microstrip coupling. It is found that aperture coupling is better for high-gain antenna applications.
Citations
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Journal ArticleDOI
TL;DR: In this article, a Fabry-Perot (FP) resonator antenna with a wide gain bandwidth in the X band was proposed, which is attributed to the positive reflection phase gradient of an electromagnetic band gap (EBG) structure, constructed by the combination of two complementary frequency selective surfaces (FSSs).
Abstract: This paper presents a novel design of a Fabry-Perot (FP) resonator antenna with a wide gain bandwidth in X band. The bandwidth enhancement of the antenna is attributed to the positive reflection phase gradient of an electromagnetic band gap (EBG) structure, which is constructed by the combination of two complementary frequency selective surfaces (FSSs). To explain well the design procedure and approach, the EBG structure is modeled as an equivalent circuit and analyzed using the Smith Chart. Experimental results show that the antenna possesses a relative 3 dB gain bandwidth of 28%, from 8.6 GHz to 11.4 GHz, with a peak gain of 13.8 dBi. Moreover, the gain bandwidth can be well covered by the impedance bandwidth for the reflection coefficient ( ${\rm S} _{11}$ ) below $-10~{\rm dB}$ from 8.6 GHz to 11.2 GHz.

182 citations


Cites background from "High-Efficient and High-Gain Supers..."

  • ...Although an FP resonator antenna has several merits such as high directivity and high radiation efficiency [13], its inherently narrow gain bandwidth severely inhibits its use for many applications....

    [...]

Journal ArticleDOI
TL;DR: In this paper, a 60 GHz wideband circularly polarized (CP) helical antenna array of 4 × 4 elements is designed and fabricated using low temperature co-fired ceramic (LTCC) technology.
Abstract: A 60-GHz wideband circularly polarized (CP) helical antenna array of 4 × 4 elements is designed and fabricated using low temperature cofired ceramic (LTCC) technology. The flexible via hole distribution is fully utilized to achieve a helical antenna array to obtain good circular polarization performance. Meanwhile, grounded coplanar waveguide (GCPW) to stripline is utilized for probe station measurement. Unlike traditional helical antennas, the proposed helical antenna array is convenient for integrated applications. The fabricated antenna array has dimension of 12 × 10 × 2 mm3. The simulated and measured impedance, axial ratio (AR) and radiation pattern are studied and compared. The proposed antenna array shows a wide measured impedance bandwidth from 52.5 to 65.5 GHz for | S11| <; -10dB, wideband measured AR bandwidth from 54 to 66 GHz for AR <;3 dB, respectively.

163 citations

Journal ArticleDOI
TL;DR: In this article, a L-probe patch antenna array using multilayer low temperature co-fired ceramic (LTCC) technology is presented for 60 GHz band applications. The proposed antenna array is designed with a high gain in the impedance bandwidth by introducing a novel soft-surface structure.
Abstract: A 4 $\,\times\,$ 4 L-probe patch antenna array using multilayer low temperature co-fired ceramic (LTCC) technology is presented for 60-GHz band applications. The proposed antenna array is designed with a high gain in the impedance bandwidth by introducing a novel soft-surface structure. The soft-surface structure comprised of metal strips and via fences reduces the losses caused by severe surface waves and mutual coupling between adjacent elements to improve the radiation performance. The proposed antenna array is convenient for integrated applications. The fabricated antenna array excluding the measurement transition has dimension of 14.4 $\,\times\,$ 14.4 $\,\times\,$ 1 mm $^{3}$ . The simulated and measured impedance and radiation performance are studied and compared. Good agreement is achieved between simulation and measurement. The proposed antenna array shows a wide simulated impedance of 29% from 53 GHz to 71 GHz for $\vert {S}_{11}\vert dB, measured broadband 3-dB gain bandwidth of 18.3% from 54.5 GHz to 65.5 GHz and the gain up to 17.5 dBi at 60 GHz, respectively.

162 citations

Journal ArticleDOI
TL;DR: A wideband high-gain high-efficiency hybrid integrated plate array antenna for inter-satellite links is presented in this paper, which consists of microstrip patches, substrate integrated waveguide (SIW) and waveguide power dividers.
Abstract: A wideband high-gain high-efficiency hybrid integrated plate array antenna for inter-satellite links is presented in this paper This antenna consists of microstrip patches, substrate integrated waveguide (SIW) and waveguide power dividers A novel feeding structure is proposed to excite the microstrip sub-array with a wideband characteristic The radiation efficiency of SIW arrays with different sizes is compared by experiment The hybrid SIW-waveguide feeding topology is optimized to realize high efficiency, low cost and compact configuration at the same time The array antenna is fabricated through standard multi-layer PCB process and milling technology Measured results demonstrate about 146% of reflection coefficient bandwidth ( $\vert {\rm S}_{11}\vert dB) in the frequency band of 57–66 GHz The gain fluctuates less than 3 dB within the same band The 1 dB gain bandwidth is 81% within the frequency band of 59–64 GHz The maximum gain is 392 dBi at 59 GHz with the efficiency of 41%

142 citations

Journal ArticleDOI
TL;DR: In this paper, a single-fed low-cost wideband and high-gain slotted cavity antenna based on substrate integrated waveguide (SIW) technology using high-order cavity modes is demonstrated.
Abstract: A novel single-fed low-cost wideband and high-gain slotted cavity antenna based on substrate integrated waveguide (SIW) technology using high-order cavity modes is demonstrated in this paper. High-order resonant modes ( ${\text T}{{\text E}_{{130}}}$ , ${\text T}{{\text E}_{{310}}}$ , ${\text T}{{\text E}_{{330}}}$ ) inside the cavity are simply excited by a coaxial probe which is located at the center of the antenna. Energy is coupled out of the cavity by a $3 \times 3$ slot array etched on the top surface of the cavity. Two antennas with different polarizations are designed and tested. Measured results show that the linearly polarized prototype achieves an impedance bandwidth $\left(\vert{{\text S}_{{\text 11}}}\vert of $> {26}\% $ (28 to 36.6 GHz), and a 1-dB gain bandwidth of 14.1% (30.3 to 34.9 GHz). In addition, a measured maximum gain of 13.8 dBi and radiation efficiency of 92% are obtained. To generate circularly polarized radiation, a rotated dipole array is placed in front of the proposed linearly polarized antenna. Measured results show that the circularly polarized antenna exhibits a common bandwidth (10-dB return loss bandwidth, 3-dB axial ratio bandwidth, and 1-dB gain bandwidth) of 11%.

135 citations

References
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Journal ArticleDOI
TL;DR: In this article, a differentially-driven microstrip antenna was proposed to analyze the input impedance and radiation characteristics of the differentially driven microstrip antennas, and their performance was investigated.
Abstract: This paper studies differentially-driven microstrip antennas. The theory of microstrip antennas based on the improved cavity model is expanded to analyze the input impedance and radiation characteristics of the differentially-driven microstrip antennas. The differentially-driven microstrip antennas were fabricated. Their performances were experimentally verified. Results show that the occurrence of resonance for the differentially-driven microstrip antennas also depends on the ratio of the separation /spl xi/ of the dual feeds to the free-space wavelength /spl lambda//sub o/. When the dual feeds are located far from each other /spl xi///spl lambda//sub o/>0.1, the resonance occurs, and the input resistance at resonance is rather large. However, when the dual feeds are located near to each other /spl xi///spl lambda//sub o/<0.1, the resonance does not occur, the input resistance is quite small, and the input impedance is inductive. Compared with single-ended microstrip antennas, the differentially-driven microstrip antennas have larger resonant resistance, similar co-polar radiation patterns, and lower cross-polar radiation component.

204 citations


"High-Efficient and High-Gain Supers..." refers background in this paper

  • ...solutions are always demanding for the researchers because of their small size, weight, and ease of integration with active components [3], [4]....

    [...]

01 Jan 2003
TL;DR: In this paper, the basic issues regarding the design and develop- ment of wireless systems that will operate in the 60 GHz band are addressed, where a massive amount of spectral space (5 to 7 GHz) has been allocated for dense wireless local communications.
Abstract: This paper addresses the basic issues regarding the design and develop- ment of wireless systems that will operate in the 60 GHz band. The 60 GHz band is of much interest since this is the band in which a massive amount of spectral space (5 to 7 GHz) has been allocated for dense wireless local communications.

110 citations


"High-Efficient and High-Gain Supers..." refers background in this paper

  • ...A NTENNA engineers and scientists are more interested in the 60-GHz frequency band for future broadband commercial communications as this range is declared as unlicensed all over the world [1], [2]....

    [...]

Journal ArticleDOI
TL;DR: A dielectric superstrate layer above a microstrip patch antenna has remarkable effects on its gain and resonant characteristics and the gain of a single patch with asuperstrate was enhanced by about 4 dBi over the one without a superstrate at 12 GHz.
Abstract: A dielectric superstrate layer above a microstrip patch antenna has remarkable effects on its gain and resonant characteristics. This paper experimentally investigates the effect of a superstrate layer for high gain on microstrip patch antennas. We measured the gain of antennas with and without a superstrate and found that the gain of a single patch with a superstrate was enhanced by about 4 dBi over the one without a superstrate at 12 GHz. The impedance bandwidths of a single patch with and without a superstrate for VSWR < 2 were above 11%. The designed 2 ×8 array antenna using a superstrate had a high gain of over 22.5 dB and a wide impedance bandwidth of over 17%.

71 citations


"High-Efficient and High-Gain Supers..." refers background in this paper

  • ...It has been reported that for high gain, superstrate layer can be added at a particular height of above the ground plane [8], [9]....

    [...]

  • ...Adding a superstrate will increase the gain nearly 4 dB over a single parasitic patch [8] and 5 dB in [9]....

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Journal ArticleDOI
TL;DR: In this paper, a circularly-polarized vertical patch antenna is proposed and investigated, which achieves a gain of 8 dBi over a 3 dB axial ratio bandwidth of 4%.
Abstract: A circularly-polarized vertical patch antenna is proposed and investigated. The design is achieved by simply adding two small stubs to the vertical patch. The antenna maintains the advantages of the original linearly polarized vertical patch antenna, such as simple structure, small size and wide bandwidth. It exhibits a gain of 8 dBi over a 3 dB axial ratio bandwidth of 4%.

61 citations


"High-Efficient and High-Gain Supers..." refers background in this paper

  • ...solutions are always demanding for the researchers because of their small size, weight, and ease of integration with active components [3], [4]....

    [...]