Endfire slot antennas

Stephenson, B.; Walter, C.

doi:10.1109/tap.1955.1144286

Cited by 21 publications

(7 citation statements)

References 2 publications

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“…Nevertheless, a poor impedance matching will be introduced when the dielectric thickness is very low [13], [14], which may limit these feeding structures for wideband and low-profile applications. Ridged structures are often employed to increase the bandwidth [15]- [17]. In [16], a flared slot antenna can achieve stable radiation beam near the end-fire direction over a 4:1 frequency band.…”

Section: Introductionmentioning

confidence: 99%

Wideband Flush-Mounted Surface Wave Antenna of Very Low Profile

Chen

Shen

2015

IEEE Trans. Antennas Propagat.

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This paper presents the design of a compact and wideband surface wave antenna that exhibits very low profile and can be flush-mounted on a conformal platform. The proposed antenna comprises a tapered grounded ceramic slab, a unidirectional surface wave launcher, and a tapered impedance transition. The ceramic slab is smoothly tapered to transform the guided surface wave into radiated space wave over a wide frequency range. The surface wave launcher employs a probe-fed parallel plate waveguide with a modified parabolic reflecting wall and a metallic post, which are critical for effectively transforming the cylindrical waves to a unidirectional plane wave within a broad frequency range. Simulated results show that the proposed surface wave antenna achieves a wide operation bandwidth from 6.1 GHz to 18 GHz with a thickness of only 0.12 at the center frequency. Acceptable gain values with stable and quasi end-fire radiation beams are obtained over the entire frequency band. A prototype of the proposed antenna is fabricated and tested. Measured results are in good agreement with simulated ones.Index Terms-Flush-mounted, low-profile, surface wave antenna, surface wave launcher, wideband antenna. 0018-926X (c) He is currently serving as theSecretary of IEEE AP-S. His research interests include design of small and planar antennas for various wireless communication systems, analysis and design of frequency-selective structures and absorbers, hybrid numerical techniques for modeling RF/microwave components and antennas. He has authored or co-authored more than 130 journal papers and presented another 120 conference papers. Zhuozhu Chen (S'13) was born in Hunan province, China. He received the B.Eng. degree and the M.S. degree in electronic engineering from Beijing Institute of Technology, China, in 2010 and 2013, respectively. He is currently working toward the Ph.D. degree in electrical and electronic engineering at Nanyang Technological University, Singapore.His research interests include design of RF/microwave antennas and circuit.

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Section: Introductionmentioning

confidence: 99%

Wideband Flush-Mounted Surface Wave Antenna of Very Low Profile

Chen

Shen

2015

IEEE Trans. Antennas Propagat.

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“…One example of a directional antenna is a tapered slot antenna (TSA) that consists of a tapered slot cut in a thin film of metal with and without a dielectric substrate supporting it. [7] A TSA was first introduced in [8], and a waveguide-fed, flared slot antenna was then studied for use in aircraft skins. [9] Although this waveguide-fed antenna with coaxial transition covered a broad band, it was neither simple nor cost effective to fabricate.…”

Section: Introductionmentioning

confidence: 99%

Spidron fractal tapered slot antenna for dual-band radar applications

Jeong

Hwang

Park

et al. 2013

Journal of Electromagnetic Waves and Applications

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A dual-broadband Spidron fractal tapered slot antenna is proposed for radar applications in the S and X bands. Dual-Spidron fractal patches are symmetrically arranged adjacent to each other, and a slot is etched from the central section of the patch to form a feeding slot. A microstrip-to-slotline transition is used to excite the tapered aperture of the Spidron fractal patch. The proposed antenna is fabricated and tested, and has compact dimensions of 35.8 mm Â 24 mm (0.358 λ 0 Â 0.24 λ 0 ). The measured À10 dB reflection bandwidths for the lower and upper frequency bands are 39.42% (2.75-4.10 GHz) and 34.74% (7.85-11.15 GHz), respectively. The measurements also indicate that the proposed antenna exhibits two types of radiation patterns, namely, a near omni-directional pattern in the lower band and a directional pattern in the upper band. The measured peak gains range from 0.4 to 2.97 dBi in the lower band and from 1.42 to 5.52 dBi in the upper band.

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“…In many cases, antennas with wide impedance bandwidth (BW), low profile, and unidirectional radiation patterns become a necessary component in these systems. A variety of broadband unidirectional antenna solutions such as horn antennas, log‐periodic antennas, cavity‐backed antennas, Vivaldi antennas, and waveguide antennas are well developed [1–5]. Although they exhibit the characteristics of broad impedance bandwidth and high gain, they are inherently bulky in size or have a high profile.…”

Section: Introductionmentioning

confidence: 99%

Wideband folded sectorial bowtie antenna with Γ‐shaped strip feed

Zhang

Gong

et al. 2010

Micro & Optical Tech Letters

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(5.75 dBi). The total efficiency of the LW antenna can be estimated as 54% from (7), neglecting the losses of the elements. CONCLUSIONSA simple nonfundamental mode LW antenna in a planar phased array configuration with meandered feed line has been proposed and demonstrated through an experimental prototype. This prototype that is implemented as an array of slot-coupled microstrip antennas presents a simple scanning solution for communication applications where adaptive channel designation can be used to achieve optimal radiation. This design can be easily scaled to millimeter wave applications. It can be designed to achieve a symmetric scan, theoretically from backward-endfire to forward-endfire, in the intended frequency band. Also, it has been demonstrated that as far as the array is small, it does not suffer from excessive loss when it scans through broadside. ACKNOWLEDGMENTSThe authors wish to thank Rogers Corporation for supporting this project by providing the substrate sample under their university program. ABSTRACT: A wideband folded sectorial bowtie antenna with C-shaped strip feed is designed. This feed mechanism is easy to adjust the impedance match. The folded sectorial bowtie antenna (FSBA) shows many advantages over the ordinary sectorial bowtie antenna (SBA). It achieves an impedance bandwidth of 94% for VSWR 2 ranging from 2.7 to 7.5 GHz, unidirectional radiation patterns, low back radiation, and low cross polarization over the whole operating band. The design is optimized numerically and validated experimentally. It is sufficient for accommodating recent wireless communication services such as WiFi, WiMAX, and lower UWB, etc.

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Endfire slot antennas

Cited by 21 publications

References 2 publications

Wideband Flush-Mounted Surface Wave Antenna of Very Low Profile

Wideband Flush-Mounted Surface Wave Antenna of Very Low Profile

Spidron fractal tapered slot antenna for dual-band radar applications

Wideband folded sectorial bowtie antenna with Γ‐shaped strip feed

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