Log Periodic Antenna Design

Siti Norhidayah , Mohamed (2008) Log Periodic Antenna Design. Project Report. UTeM, Melaka, Malaysia. (Submitted)

	PDF (24 Pages) Log_Periodic_Antenna_Design_Siti_Norhidayah_Mohamed_TK7871.6.S57_2008_24.pdf - Submitted Version Download (1MB)
	PDF (Full Text) Log_Periodic_Antenna_Design_Siti_Norhidayah_Mohamed_TK7871.6.S57_2008_FULL_TEXT.pdf - Submitted Version Restricted to Registered users only Download (7MB)

Abstract

This project presents the design of microstrip Log Periodic Antenna. The antenna was designed at frequency between 2.0GHz and 2.4GHz for Wireless Area Local Network (WLAN) and International Mobile Telecommunication 2000 (IMT2000). The main problem of microstrip antenna is the narrowband characteristic up to 3% of bandwidth. The objective of this project is enhance the bandwidth of microstrip antenna. The constructing of this antenna including design, simulate and fabricate a log periodic antenna for broadband application. First, the single element for each frequency have been designed. Then, the three elements, five elements and seven elements have been designed with scaled by scaling factor of 1.05, 1.03 and 1.02. After that, the design antenna have been simulated by using Microwave Office software (AWR 2006) to performs the simulation of return loss, reflection coefficient, bandwidth and gain. The experimental validation to verify the performance of the designed antenna was done using the Advantest R3767 CG Network Analyzer and Spectrum Analyzer. The properties of antennas such as bandwidth, gain and half power beamwidth have been investigated and compared between simulation and measurements. The design provided the bandwidth better than -20.22% in the working bandwidth of five elements. Besides, the radiation pattern of three elements shows the HPBW at 63° for H-co polarization. Then, the five elements show the HPBW is 88° at frequency 2.31GHz for H-co polarization.

Actions (login required)

View Item