Low-profile Magneto-electric Dipole Antenna
TL;DR: In this article, a magneto-electric dipole-like antenna was developed for Ku-band (12-18 GHz) applications, and a low-profile configuration of the antenna was obtained by the planar arraignments.
Abstract: Here, a magneto-electric dipole-like antenna is developed for Ku-band (12–18 GHz) applications. A low-profile configuration of a magneto-electric dipole antenna has been obtained by the planar arra...
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TL;DR: In this article , a compact magneto-electric (ME) dipole antenna has been designed to improve bandwidth and gain, which combines a wide impedance bandwidth with a high broadside radiation gain in a small package.
Abstract: A compact magneto‐electric (ME) dipole antenna has been designed to improve bandwidth and gain. The E‐dipole and M‐dipole elements have separate resonance modes, that is, the E‐dipole operates from (4.5 to 5.15 GHz, and 5.36 to 6.4 GHz) and the M‐dipole operates from (4.25 to 5.2 GHz). A ME dipole structure is generated when the (E + H) dipole structures are combined. For successful ME coupling, the E‐dipole lengths are enlarged at the top and bottom, while truncated in the center. This configuration combines a wide impedance bandwidth with a high broadside radiation gain in a small package. The ME dipole element has a bandwidth of 42.44% from (3.1 to 3.6 GHz, and 4.7 to 6.2 GHz) and gain of 7.1 dBi when the isolated resonant modes of E‐ and M‐dipoles are efficiently induced. To improve overall antenna performance, a metallic reflector is loaded at a height of Hair = 8 mm, resulting in an increase in bandwidth of 82.35% from (2.5 to 6.0 GHz) and a gain improvement of 10.2 dBi. A constructed prototype antenna has been tested and found to be in good agreement with simulated results, to be potentially explored in wireless communication systems.
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TL;DR: In this paper, a planar W-band monopulse antenna array based on the substrate integrated waveguide (SIW) technology is designed, where the sum-difference comparator, 16-way divider and 32 × 32 slot array antenna are all integrated on a single dielectric substrate in the compact layout through the low-cost PCB process.
Abstract: A planar W-band monopulse antenna array is designed based on the substrate integrated waveguide (SIW) technology The sum-difference comparator, 16-way divider and 32 × 32 slot array antenna are all integrated on a single dielectric substrate in the compact layout through the low-cost PCB process Such a substrate integrated monopulse array is able to operate over 93 ~ 96 GHz with narrow-beam and high-gain The maximal gain is measured to be 258 dBi, while the maximal null-depth is measured to be - 437 dB This SIW monopulse antenna not only has advantages of low-cost, light, easy-fabrication, etc, but also has good performance validated by measurements It presents an excellent candidate for W-band directional-finding systems
213 citations
TL;DR: In this article, the authors presented a 32 $\,\times\,$ 32 high-gain patch array antenna fed by the substrate integrated waveguide (SIW) structure at W-band.
Abstract: This communication presents a 32 $\,\times\,$ 32 high-gain patch array antenna fed by the substrate integrated waveguide (SIW) structure at W-band. The array antenna consists of two layers to achieve a compact topology, which allows for mass production using a standard PCB fabrication process. The wideband feeding network is placed in the bottom layer while the radiating patches are on the top layer. This configuration also resolves the trade-off between gain and bandwidth of conventional SIW array antennas. Measured gain of the 32 $\,\times\,$ 32 antenna array is within the range 28.81–29.97 dBi in the working bandwidth of 91–97 GHz. Measured impedance bandwidth covers the same frequency band for $\vert {\rm S} _{11} \vert . The cross-polarization of the antenna array is less than 40 dB at the beam direction. Good agreement between the simulated and measured results validates our design.
178 citations
TL;DR: In this article, a wideband directional antenna composed of a shorted bowtie patch antenna and an electric dipole is presented, which has a wide impedance bandwidth, which is over 60% for SWR.
Abstract: A wideband directional antenna composed of a shorted bowtie patch antenna and an electric dipole is presented. Through this composition, an equivalent magnetic dipole due to the shorted bowtie patch antenna and an electric dipole are excited together. Almost equal radiation pattern in the E- and H-planes is obtained. The proposed antenna has a wide impedance bandwidth, which is over 60% for SWR. < 2 ranging from 2.16-4.13 GHz.
126 citations
TL;DR: In this paper, a magneto-electric dipole antenna with a unidirectional radiation pattern is proposed to achieve a stable gain of 8.25±1.05 dBi for SWR ≤ 2 from 2.95 to 10.73 GHz.
Abstract: A new magneto-electric dipole antenna with a unidirectional radiation pattern is proposed. A novel differential feeding structure is designed to provide an ultra-wideband impedance matching. A stable gain of 8.25±1.05 dBi is realized by introducing two slots in the magneto-electric dipole and using a rectangular box-shaped reflector, instead of a planar reflector. The antenna can achieve an impedance bandwidth of 114% for SWR ≤ 2 from 2.95 to 10.73 GHz. Radiation patterns with low cross polarization, low back radiation, fixing broadside direction mainbeam and symmetrical E- and H -plane patterns are obtained over the operating frequency range. Moreover, the correlation factor between the transmitting antenna input signal and the receiving antenna output signal is calculated for evaluating the time-domain characteristic. The proposed antenna, which is small in size, can be constructed easily by using PCB fabrication technique.
118 citations
TL;DR: In this paper, a dual-mode triangular-ring slot (TRS) antenna was proposed by simultaneously exciting the SIW cavity, the slot mode and the patch mode inside the slot.
Abstract: Substrate integrated waveguide (SIW) cavity backed dual-band triangular-ring slot (TRS) antennas are proposed for planar integration. First, a low profile dual band 45 °
linearly polarized (LP) antenna is designed and analyzed. The dual-mode TRS is proposed and developed by simultaneously exciting the mode of the slot and the mode of the patch inside the slot. To minimize the antenna size, the lowest mode (TE110 mode) of the SIW cavity is adopted to excite the TRS. The -10 dB impedance bandwidth at the higher band is 5.9%, 58.3% wider than that of the conventional SIW cavity backed slot antenna. The interactions of the SIW cavity, the slot mode and the patch mode are analyzed with circuit models and verified by full wave simulations, which provides a new insight into the SIW cavity backed antennas. Then, by exciting a pair of the 45° LP antennas with an SIW coupler, a circularly polarized (CP) dual band antenna with a small frequency ratio of 1.26 is developed. The two antennas are fabricated and tested, and the measured and simulated results agree well.
112 citations