A Single Broadband Antenna The Log Periodic Antenna

Juliana , Abdul Rahim (2011) A Single Broadband Antenna The Log Periodic Antenna. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

In telecommunication, the frequency spectrum is a rare commodity and each band is assigned for a specific application. A log-periodic antenna is a broadband, multi-element, unidirectional, narrow-beam antenna that has impedance and radiation characteristics that are regularly repetitive as a logarithmic function of the excitation frequency. The active log periodic antenna as suggected in the title of the project ia a single broadband antenna whose characteristics vary as a periodic function of the logarithm of the frequency. This project is to look into the design of a broadband antenna that covers the important TETRA band and extend to measurement of unusable signal sources up to 18GHz. Apart from application as a high quality measurement-antenna and direction finder, this antenna is also very well suited as a directional-antenna for WLan, WiFi, and other directional communication applications. A small physical antenna-size plus low weight will make this antenna a specialty for mobile use and the detection of unusable signal sources like military radar, various satellite services and very high frequency bugs.

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