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What is the antenna model in the communication terminal and the radar system?
Source:Original | Author:C&T RF Antennas Inc | Publish time: 2019-04-19 | 729 Views | Share:


Abstract: In a communication system or radar system, the antenna model needs to be closely combined with the communication channel or the radar usage scene to work together. This paper studies the communication and radar system simulation compares the antenna models in the two types of systems and summarizes several methods for considering the antenna performance in the current communication terminal and radar system simulation design.

Keywords: antenna model, system simulation, communication system

1 Introduction

For communication or radar systems, the antenna plays the role of transmitting and receiving electromagnetic waves. The performance of the antenna will have a great impact on system performance. Traditional theory and simulation techniques rarely put antennas into communication/radar systems for overall consideration. Antenna designers focus on the directionality, efficiency, volume and other indicators of the antenna. The antenna and transmission channel are rarely considered. It is even more difficult to consider how the antenna characteristics can affect the system.

This paper summarizes the differences in antenna models and the focus of simulation in two different systems by studying the methods and system simulation examples of antenna and transmission channel model modeling in communication terminals and radar systems.

2. Antenna model in the communication terminal

The mobile communication channel mainly has the following characteristics: open variable-parameter channel, which is susceptible to various interferences; the geographical environment of the receiving point is very complex and diverse, such as roughly divided into three categories: urban, suburban and rural; users have random mobility.

Due to the characteristics of the above mobile communication channel, the electromagnetic wave propagates compared with the free space. In addition to the direct wave, there are many diffracted waves and scattered waves, and there are different types of losses: path propagation loss, slow fading loss, and fast fading. Loss. In order to obtain the best reception effect in different environments, the antenna of the communication terminal is designed as an omnidirectional antenna as much as possible.