Direction Finding System using Circular Array of Log-Periodic Antennas and Leaky-Wave Structures******

作为电磁波传感器的先进天线系统是要求苛刻的电子战/情报、监视和侦察(ISR)应用中的关键前端部件。全向信号覆盖和定向天线性能对于电子情报(ELINT)和通信情报(COMINT)应用都很重要，包括电子监视(ES)、测向(DF)、通信(COMS)和电子攻击(EA)。典型的系统由复杂的天线前端和软件处理单元组成。位于渥太华的D-TA系统公司提供开放式架构解决方案和具有板载多核软件处理单元的最先进的传感器接口产品。该项目的目标是设计、设计和演示在0.5 GHz-18 GHz频段内工作的前端天线系统**，适用于包括DF在内的多种应用，具有全向(360度覆盖)和定向辐射特性，重量最轻，尺寸尽可能小。为了获得ELINT和COMINT应用中所需的多种辐射特性，提出了两种基于对数周期天线阵列和漏波天线的方法。拟议的项目侧重于增强D-TA在加拿大境内完全建立高级信号智能(SIGINT)系统的能力，而不依赖外部天线供应商。因此，该项目有望帮助建立D-TA在电子战领域的主导地位，并为国防等重要战略部门保留加拿大国内已开发的技术诀窍。

Advanced antenna systems as the Electromagnetic Wave Sensors are the critical front-end components in demanding Electronic Warfare (EW)/Intelligence, Surveillance and Reconnaissance (ISR) applications. Both omni-directional signal coverage and directional antenna performance is important for Electronic Intelligence (ELINT) and Communication Intelligence (COMINT) applications including, Electronic Surveillance (ES), Direction Finding (DF), Communications (COMMS) and Electronic Attack (EA). Typical systems consist of sophisticated antenna front-ends followed by software processing unit. D-TA Systems Inc. in Ottawa offers open-architecture solutions and state-of-the-art sensor-interface products with on-board multi-core software processing units. The goal of this project is to devise, design and demonstrate front-end antenna systems**operating within 0.5 GHz - 18 GHz frequency band for several applications including DF, with both omni-directional (360 degree coverage) and directional radiation properties, in lowest weight and smallest size possible. Two approaches based on Log-Periodic Antenna Arrays and Leaky-Wave Antenna has been proposed, for achieving wide variety of radiation characteristics required in ELINT and COMINT applications. The proposed project focusses on enhancing the capabilities of D-TA in building advanced Signal Intelligence (SIGINT) systems completely within Canada without relying on external antenna vendors. This project is thus expected to help establish D-TA's dominance in EW sector, and retain the developed technological know-how inside Canada for an important strategic sector like national defense.**