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This paper presents an interesting feature of the resonant slotted-waveguide antenna array: the difference pattern at off-center frequencies. Our demonstration uses a 12-element center-fed resonant slot array on rectangular waveguide. The simulation results show that the array produces a sum beam pattern at center frequency, and difference beam patterns at two off-center frequencies (around ±8%)....
Methods of reducing both electric and magnetic field coupling for enhancing the isolation in broadband MIMO antenna system is presented. The proposed MIMO antenna consists of two coplanar waveguide (CPW) fed self-complementary antennas (SCAs) and a U-shaped slot is etched on the ground plane. The protruding structure from the ground plane behaves as both the part of the SCA and an isolator when two...
A slablike folded dipole antenna is proposed for low frequency airborne radar applications. The proposed antenna has a wide impedance bandwidth, low profile, and small size. Without ground plane (GP), the antenna relative bandwidth is over 54% (VSWR≤2). The relative bandwidth of the embedded antenna in the leading edges of fighter wings is also more than 45% (VSWR≤2), notwithstanding smaller size...
It is known to us, double-ridged horn antenna is one of common and important antenna types, it has been widely used in the EMC, measurement, radar and communication system. A 118GHz double-ridged horn antenna that possesses high performance is designed with the HFSS. VSWR, Gain and radiation pattern of the antenna can fulfill engineering demands based on the simulation of HFSS. Further, this paper...
This paper presents a novel method to enhance the pattern characteristics of the TEM horn antenna for 2-19 GHz frequency band. The conventional TEM horn antenna introduces some fluctuations in the main lobe radiation pattern over the center frequencies, which are 10-15 GHz. This motivated us to propose a new method to remove the aforementioned impact by carving an arc shape to the open end of exponentially...
Two low-profile bow-tie antenna designs are presented, printed conformally on high-impedance ground planes (HIGPs). The HIGPs were constructed using two different scale triangular patch mushroom elements which allow for a suitable platform for the active bow-tie antenna. The multiscale nature of the HIGP was utilized to further increase the frequency band-gap of the surface waves, and to enhance the...
Microstrip Antennas (MSAs) consist of a metallic radiating patch on one side of thin dielectric substrate and other side is ground plane. Most important advantages of MSAs are low profile, light weight and compatibility with integrated circuit technology. MSAs are used in mobile communication, satellite communication, radar, direct broadcasting, global positioning systems and remote sensing. The major...
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