Investigation of a Curtain Antenna Array for TIGER

Quang Nguyen, Dr John DevlinElectronics Engineering Dept

La Trobe University

Australia

Problems of currently used antennas

• Structural problem

1. Broken long elements (wind 47 m/s)

2. Tower bent along wind direction

3. Twisted of horizontal boom

• Questioning of antenna performance

Objectives

• Modification of the Log periodic antenna to achieve a robust structural that requires minimal maintenance.

• Implementation of frequency independent array to ensure a broadband operation.

0.80.85

0.9

0.95tau

0.050.1

0.150.2

0.25sigma

0

10

20

30

40

alpha

0.80.85

0.9

0.95tau

Possibility of compact LPDA

41

tan 1

n

n

ll 1

n

nn

l

s

21,

1, nns

nl

0 5 10 15 20 25 30 35

0.5

1

1.5

2

2.5

3

3.5

4

L

Bs = 3.46

Bs = 2

L/Alpha/Bs relationship

A Different Approach

12,1

11

NL

s

0.8 0.85 0.9 0.95 1

5

10

15

20

25

30

35

n

Bs = 3.46

Contour lines of s1/L

L/1s gnisaercnI

Bs/Tau/N/S1/L relationship

Broaden Structure Bandwidth

Control of electrical height