Kenji Inomata

A millimeter-wave radar for train application

A millimeter-wave radar using a spread spectrum technique for train applications has been developed in the 60 GHz band. This radar measures the distance, velocity, azimuth angle, and the magnitude of received signal of each target. The methods for detection are described in this paper. In the experiment, the radar detected the linear shape of trains.

Two-Dimensional Target Location Estimation Technique Using Leaky Coaxial Cables

This paper presents a target location estimation method that can use a pair of leaky coaxial cables to determine the 2D coordinates of the target. Since convention location techniques using leaky coaxial cables can find a target location along the cable in 1D, they have been unable to locate it in 2D planes. The proposed method enables us to estimate target on a 2D plane using; 1) a beam-forming technique and 2) a reconstruction technique based on Hough transform. Leaky coaxial cables are equipped with numerous slots at regular interval, which can be utilized as antenna arrays that acts both as transmitters and receivers. By completely exploiting this specific characteristic of leaky coaxial cables, we carried out an antenna array analysis that performs in a beam-forming fashion. Simulation and experimental results support the effectiveness of the proposed target location method.

A Sideways-Looking Radar and its Measuring Principles

A 24GHz Sideways-Looking Radar is expected to become a key component of a warning system for lane changes on the highway. This report describes relative positional measurement for distance and velocity and the results of an experiment.

2-Dimensional Measuring Method Using a Wide-area Surveillance Sensor with Leaky Coaxial Cables

We have developed a wide-area surveillance sensor with a pair of leaky coaxial cables (LCX). It detects targets in the surveillance area by scattering signals generated by targets whose positions are measured using propagation delay time. Such a sensor has been studied previously; however, several problems remain. The primary issue is two-dimensional sensing which in practice is desired to improve the accuracy of the boundary line of the surveillance area. In this paper, we present a fundamental beam-forming technique for LCXs and a method for measuring 2-dimensional target position using a multi-frequency measurement technique

2 in 1 leakey coaxial cable for intrusion detection sensor

Novel leaky coaxial cable (LCX) is developed. It contains both transmitting and receiving LCX for intrusion detection sensor. While the suppression of coupling between transmitter and receiver is major theme in microwave technology, we give a solution of transmitter and receiver antenna combination. We have developed a prototype of 2 in 1 LCX and then evaluated its performance for intrusion detection sensor in field experimentation.