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This paper presents the design of a 1×10 series feeding rectangular microstrip patch array antenna for 77 GHz automotive radar. The proposed antenna is designed based on the transmission line model analysis method. To satisfy the sidelobe level of −20 dB in E-plane, 20 dB Taylor distribution is applied to the proposed antenna. Considering the measurement environment, waveguide to microstrip transition...
The active element pattern (AEP) and beam pattern of a patch array antenna are analytically calculated with a finite ground plane. The patch antenna is modeled by two equivalent magnetic current sources. Edge diffraction by surface wave is also added. To obtain AEP, the phase and magnitude of scattering parameters from full-wave simulation are utilized. To validate our calculation, the calculated...
The radio holography method performs the direction-of-arrival (DOA) estimation of radio waves with a relatively simple array system because it uses a reference antenna. This paper proposes a new radio holography method in which cyclic correlations of digital-modulation signals are introduced for the DOA estimation of desired signals only. The DOA estimation accuracy of the method is evaluated by computer...
Restriction of communication area is preferable in view point of security. In this paper, a communication area restriction method is proposed. In the proposed method, binomial coefficient array for transmitting and for jamming is used. In the conventional method, the beam for jamming was formed using 2 elements; while in this paper, the beam is formed using 8 elements binomial array. As a result of...
This paper presents rotational circularly polarized array antenna at 12 GHz. Array antenna degraded radiation performance because of mutual coupling between adjacent elements. General array antenna has same direction port each single elements. However, proposed rotational array antenna has different direction port to reduce the mutual coupling. As a results, mutual coupling of 2 by 2 rotational array...
In this paper, a blind signal separation method for two incoming waves using eigenvector synthesis is proposed. The array weights to separate each waves are made from two eigenvectors. Numerical results show that the proposed method could improve the signal separation characteristics.
A Cuboid Dielectric Resonator Antenna fed by microstrip feed line is studied. The dielectric resonator of the antenna is made by a material with high dielectric constant ∊r=30. The impedance matching of dielectric resonator can be improved by using a # slot in the ground. In additional, a two elements array is used to enhance the performance of the antenna. This proposed antenna is suitable for long-term...
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