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This paper investigates the electromagnetic backscattering characteristics of moving vehicles when they are illuminated by the radiation of radar antennas. In particular, the vehicles are located close to the antennas as appeared in the anti-collision warning system at millimeter wave (mmW) frequencies. The backscattering fields are processed through the procedure of a realistic radar system to exhibit...
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...
This paper presents a compensation of variation effect of antennas for stepped-frequency radar identification systems. The antenna effects due to the variation in the antenna response and the mutual coupling degrade the target response in the identification systems. The equation used to reduce the antenna effect is derived. The simulations are demonstrated to validate the benefit of the compensation...
Antennas are important for digital data communication and radar applications. For various applications, special performances of antennas are required. In this paper various kinds of antenna, reflector antenna, phased array antenna, low profile antennas, and reconfigurable antennas, will be discussed for various applications.
In this paper, the bandwidth enlargement method of the conventional λ/4 monopole antenna on finite ground plane is investigated for utilization in IFF (Identification friend or foe) of the secondary radar the operating frequency 1.03–1.09 GHz. For the initial study, we have proposed the structure of the resonant holes on the surface of a sector of metallic cylinders covering such the monopole that...
This paper discusses the detection of drone with Frequency-Modulated Continuous-Wave (FMCW) Radar system. The system employs 11GHz to 11.15GHz frequency bandwidth to generate sawtooth linear wave through bistatic antennas with the gain of 33.7dBi, and the output transmitter power is 35dBm. Metal baffles were placed between and each side of the antennas to minimize the direct path interference. The...
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...
This paper describes a concept of multi-static primary surveillance radar (MSPSR) developed by ENRI. We have so far proposed an optical fiber connected passive primary surveillance radar (OFC-PPSR) which is based on the principle of passive bistatic radar. A separated receiver unit uses scattered waves from aircraft and radar reference data transmitted by the radio over fiber (RoF). Radio frequency...
Antennas are important for digital data communication and radar applications. For various applications, special performances of antennas are required. In this paper various kinds of antenna, reflector antenna, phased array antenna, low profile antennas, and reconfigurable antennas, will be discussed for various applications.
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