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- 摘要
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- 实验方案
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UWB radar cross section reduction in a compact antipodal Vivaldi antenna
摘要： This paper presents the design of a compact antipodal Vivaldi antenna (AVA) with reduced radar cross section (RCS) for directional UWB communications. The impedance characteristics of a conventional AVA are improved by introducing a BALUN taper in the ground plane and circular slots of different diameters in the wings of the AVA. The slots on the wings improve the RCS performance of the antenna by rejecting the orthogonal radiations from the AVA. Furthermore, drills of suitable diameter are introduced to further enhance the monostatic RCS performance. The proposed AVA offers 74% size reduction compared to the existing AVAs reported in literature with its bandwidth extending from 3 GHz to over 12 GHz. The prototype AVA is fabricated and the simulation results are veri?ed using experimental measurements. The prototype antenna offers at least 11 dB reduction in RCS throughout the operating bandwidth with a peak reduction of 16 dB at 7 GHz and 11 GHz.
关键词： Vivaldi antenna,UWB,Tapered slot antenna,Stealth applications,Monostatic RCS
更新于2025-09-23 15:23:52
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Adaptation of Babinet's Principle for Complementary Antennas in a Dielectric Half-Space
摘要： Babinet’s Principle is widely known to relate the impedances of complementary structures. However, the usefulness of the principle is fundamentally limited by the requirement that the complementary structures be in homogeneous media - preventing its use for modern printed circuit board style constructed antennas with a dielectric backing. This letter shows a modification of Babinet’s Principle to describe the impedance relationship of complementary structures in a dielectric half-space - providing a deeper theoretical understanding of complementary structure behavior. This provides a first step toward an analytical solution for Babinet’s Principle applied to finite dielectric backings.
关键词： planar antennas,Babinet’s Principle,dipole,slot antenna
更新于2025-09-23 15:23:52
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[IEEE 2018 International Conference on Current Trends towards Converging Technologies (ICCTCT) - Coimbatore (2018.3.1-2018.3.3)] 2018 International Conference on Current Trends towards Converging Technologies (ICCTCT) - Broadband Circularly Polarized U-Slot Antenna for Wireless Application
摘要： The antenna presented in this paper is a broadband circularly polarized U slot antenna. The circularly polarized radiation is achieved in this paper by suspending two separated rectangular strips from the inner edge of ground and using inverted L-shaped central feeding stub. The L-shaped stub is oriented at 90 degree with respect to grounded strips. The impedance bandwidth of the antenna proposed here varies from (4.68 - 6.42 GHz) which is 31.3% and the axial ratio bandwidth (<3 dB) is from (5.15-6.45 GHz) which is 22.4% for WLAN (ranging from 5.15 to 5.85 GHz) and WIMAX (5.8GHz,5.5 GHz) applications. The antenna is left and right hand circularly polarized in Z>0 and Z<0 directions respectively. A wide notch is cut from the ground which enhances the ARBW by 51.35% in comparison to simple square shaped ground. All the results have been simulated successfully.
关键词： circular polarization (CP),axial ratio bandwidth (ARBW),slot antenna,coplanar waveguide (CPW),wireless LAN
更新于2025-09-23 15:22:29
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ELECTRICALLY RECONFIGURABLE RADIATION PATTERNS OF SLOT ANTENNA ARRAY USING AGILE PLASMA WALL
摘要： In this paper, an antenna with recon?gurable radiation pattern in the H-plane at 2.45 GHz for high power applications is presented. It is based on a 3-slot array in the E-plane covered partially with a wall of plasma in order to reduce the length of the slots and consequently ensure electrically a modi?cation of the radiation pattern in the H-plane. The power distribution of the array is ensured with a power splitter.
关键词： recon?gurable radiation pattern,high power applications,slot antenna array,plasma wall
更新于2025-09-23 15:21:01
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Beam Splitting of a Novel Triple-Beam Slot Antenna Array Based on Radial Gap Waveguide
摘要： We present a phenomenon of beam splitting caused by asymmetric boundaries. We design and manufacture a novel triple-beam slot antenna array working at X-band to verify this phenomenon and show its potential applications. The corporate-feed slot antenna is based on a radial ridge gap waveguide (RGW) power divider, and is excited by a central coaxial connector. To achieve good efficiency, a radial SMA-RGW transition structure is proposed. Six different symmetrical and asymmetrical triple-beam RGW slot antenna arrays are mentioned in this paper. Among them, two symmetrical and one asymmetrical triple-beam RGW slot antenna arrays are fabricated and measured, and the measured results have good agreement with full-wave simulations, demonstrating stable performance of the proposed antenna array. Compared with the traditional slot antenna array, the proposal is capable of generating any number of beams in theory, especially odd beams, and each beam can be individually designed. The proposed shared-aperture radial multi-beam antenna can achieve simultaneously multi-directional coverage. It can meet the needs of multi-target tracking and imaging in blind spot detection and collision warning scenarios of the vehicular radar system. It also has potential value to satisfy the need of large-scale users connection in the wide-area continuous coverage scenario of the fifth generation communication system.
关键词： Beam splitting,slot antenna array,radial feeding network,ridge gap waveguide
更新于2025-09-23 15:19:57
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[IEEE 2018 15th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON) - Chiang Rai, Thailand (2018.7.18-2018.7.21)] 2018 15th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON) - A Printed Circular Monopole Antenna with Slot and Modified Ground Plane for UWB Applications
摘要： This paper presents a design of a circular monopole antenna for ultra wideband (UWB) applications. The antenna is fed by a 50 (cid:2) tapered microstrip line, and printed on a FR4 substrate with relative permittivity of 4.3 and height of 1.6 mm. All optimal parameters of a circular monopole with slot have been presented to accomplish |S11| better than -10 dB with good radiation over UWB frequency. The design includes a modified partial ground plane to enhance the S-parameter characteristics and radiation properties across the whole UWB frequency band. The parameters, which affect the performance of the antenna with respect to frequency characteristics, are investigated and reported.
关键词： Slot Antenna,A Printed Circular Monopole Antenna,Modified Ground Plane,UWB Applications
更新于2025-09-19 17:15:36
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[IEEE 2019 6th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) - Xiamen, China (2019.11.26-2019.11.29)] 2019 6th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) - A Ku-band Broadband Single-Ridge Waveguide Slot Antenna Array for UAV SAR Application
摘要： a Ku-band broadband waveguide wide side longitudinal slot antenna array for unmanned aerial vehicle (UAV) SAR application is designed. A single-ridge is employed to reduce the sectional size of the waveguide, and to achieve wide scanning ability. The bandwidth of the antenna is expanded by the single-ridge and subarea feeding of the slots. The active admittance of the waveguide slot is extracted based on the simulation using the HFSS software, in order to determine the size parameters of the waveguide slots. The simulation mode is built and the size parameters of the waveguide slots are modified and optimized by the aperture distribution re-deducing method. This design method has high efficiency and high veracity. An antenna array of 72 waveguide slot antenna lines is designed and manufactured. The measured results show that the relative bandwidth of VSWR smaller than 2 is 15%. The measured patterns show that the side lobe is smaller than -21.5dB, the cross polarization is better than -40dB, and the scanning angle is ±60° in azimuth direction. This waveguide slot antenna array has many advantages such as wide band, wide scanning, low side lobe and compact structure, and is suitable for UAV SAR application.
关键词： phased array antenna,single-ridge waveguide,waveguide slot antenna,broadband
更新于2025-09-19 17:13:59
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Wideband Substrate Integrated Waveguide Fed Open Slot Antenna Array
摘要： This work investigates the use of substrate integrated waveguide fed open slot antenna (WOSA) in an array for the first time to provide a new SIW slot antenna array with wide bandwidth and single-layer structure. The antenna array consists of 4 × 2 substrate integrated WOSA elements as a radiating part and two 1-to-4 SIW power dividers as the feeding network. The whole array is differentially fed and built on a single-layered laminate. To demonstrate the wideband performance of the substrate integrated WOSA elements, two sets of feeding networks designed at different frequencies are used to feed the same radiating part. In this way, a V-band and a W-band array were built. Both the antenna arrays were fabricated and measured. Benefiting from the excellent performance of the substrate integrated WOSA elements, the antenna array achieves a wide bandwidth of 32.3% (54.0 to 74.8 GHz) with a peak gain varies from 11.3 to 15.6 dBi. It has been demonstrated that the substrate integrated WOSA array can achieve a wide bandwidth with a single-layer structure, which is attractive for millimeter-wave applications.
关键词： waveguide fed open slot antenna (WOSA),Antenna array,wideband,millimeter-wave
更新于2025-09-19 17:13:59
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Millimeter-wave Air-filled Slot Antenna with Conical Beam Based on Bulk Silicon MEMS Technology
摘要： In this communication, a millimeter-wave (mm-wave) air-filled slot antenna with a conical beam at 60 GHz is proposed. The antenna is suitable to be integrated with various IC systems mainly because it is designed and fabricated based on bulk silicon MEMS technology. The whole structure is composed of an antenna part and a waveguide to SIW converter. In the antenna part, four meander slots are arranged annularly and excited by a square air cavity. The conical radiation pattern benefits from the out-phase E field excited on slots. An operating bandwidth of 2.17% for S11 < -10 dB and a conical beam peak gain of 3.21 dBi are achieved. The proposed antenna shows its potentials in mm-wave indoor communication.
关键词： IC integration,slot antenna,Millimeter wave,indoor communication,conical beam,bulk silicon MEMS technology
更新于2025-09-16 10:30:52
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Substrate integrated waveguide based cavitya??backed selfa??triplexing slot antenna for Xa??Ku band applications
摘要： A planar substrate integrated waveguide (SIW) based cavity-backed self-triplexing slot antenna is proposed for X-Ku band applications. The antenna comprises of the SIW cavity, radiating slots, and feeding networks. The radiating slots; that are etched on the upper metallic plane of the SIW, are backed up by the three radiated quarter cavities (QCs). The radiating slots in the respective QCs are of different lengths, excited by three separated orthogonal feed lines to resonate at three different frequencies as 11.01, 12.15, and 13.1 GHz. By fine-tuning the antenna parameters, an intrinsic input port isolation of better than 26 dB is realized which helps in achieving the self-triplexing property. The behaviors of individual cavity modes at three resonant frequencies are explained with the help of Z-parameter. The proposed antenna layout is easy to integrate with the planar circuit. The proposed antenna is fabricated and measured results display a close concern with the simulated results. Moreover, a unidirectional radiation pattern and gain of 5.1, 5.54, and 6.12 dBi at resonant frequencies are realized.
关键词： quarter cavities (QCs),self-triplexing slot antenna,isolation,substrate integrated waveguide (SIW),cavity-backed
更新于2025-09-16 10:30:52