A Log Periodic Aerial for VHF Band

ABSTRACT

This article describes the design and construction features of a VHF log-periodic aerial. The desired features of this wide band, moderate gain and limited directivity aerial are indicated. The design parameters are discussed and the construction features are described. The methods used for measuring aerial characteristics are described and test results are discussed. The performance figures compare favourably with similar aerials available commercially abroad. The aerial is constructed from indigenously available materials. The aerial costs less than a third of an imported aerial of similar performance. The aerial is suitable for receiving and low-power transmitting applications and is specially suitable for monitoring work.