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A surface wave antenna with an antenna gain of 6.29dBi and an FB ratio of 16.7dB at 8.3GHz is presented. This antenna is vertically polarized and designed for unidirectional beam having a low-profile structure with a height of 0.098λ_0. This antenna is composed of a loop element and arrayed dogbone-shaped elements. The phase distribution of electric field radiated from both elements are analyzed the...
In this paper, the size of a log-periodic dipole array antenna is reduced using partially applied folded planar helix dipole elements. The proposed antenna shows almost no gain deterioration in the entire operating bandwidth even though its size is reduced by 39 %. Due to its reduced size and lightweight characteristics, it is expected that the proposed antenna could be effectively utilized in the...
In this paper, we review how to design geometrical asymmetry for enhancement of phase-shifting nonreciprocity and for optimizing its dispersion in composite right/left handed transmission lines for antenna applications.
This paper proposes the design of high gain and broadband waveguide antenna which is fed by using a microstrip antenna is at 2.33 to 5.24 GHz. A feeding network is broadband microstrip antenna with the flower-shaped combined with the rectangular waveguide antenna to improve the directive gain. The proposed antenna can be fabricated on conventional low-cost materials by using FR4 and aluminum plate...
A pattern reconfigurable antenna is proposed for vehicle to vehicle (V2V) communication applications. The proposed antenna consists of a monopole antenna at the center of the equilateral triangle structure with three reconfigurable parasitic elements with a PIN diode at each sidewall of the structure. When the diode is on, the parasitic element becomes a reflective surface. When the diode is off,...
This paper presents a switch-beam circular array antenna using pattern reconfigurable Yagi-Uda antenna. A two-beam switching Yagi-Uda antenna is applied as an array element. The 3-element circular array is introduced to be able to switch the main beam in azimuth direction by switching the beam and shifting the excitation phase of array elements. The array antenna is designed at 2.4 GHz for drone or...
An ultra-wideband TEM horn antenna with ridge is simulated and designed. The feed mode of the antenna adopts the form that the coaxial line is parallel to the radiation direction. By modeling and simulating in CST Microwave Studio® software, it can realize that the impedance bandwidth of |S11|< −10dB is 1‱30 GHz or more. Within this operating bandwidth, the antenna has directional radiation pattern...
This work aims at reporting certain short dipole antenna array configurations which are developed and optimized for better utilization of Near Vertical Incidence Skywave (NVIS) application on ships.
An experimental validation for millimeter-wave (mm-wave) channel measurement is presented in a reverberation chamber (RC) at 28 GHz band. A 28 GHz channel sounder and a vector network analyzer were used to measure complex channel transfer functions at the specific position of the rotating mode-stirrer in the RC. To demonstrate the experimental validation according to different antenna directions and...
In this paper, a compact two-patch array design is proposed for unmanned aerial vehicle applications. High gain directive antennas are employed to extend the wireless transmission range of either control signals or data streams. Considering that the handheld remote controller is likely to be aligned toward the airplane during operation, a compact patch array, which can be attached to the top of a...
In order to solve the problem of the stability of the UWB omnidirectional radiation antenna, a three-dimensional bipolar antenna is proposed, which is composed of metal frame with Klopfenstein curve boundary. The antenna is fed with a 50 Ω coaxial line and the reflection coefficient |S11| <-10 dB is achieved in the frequency range of 0.45–23.8 GHz. In addition, the H-plane pattern at 22 GHz in...
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