Datasheet

APPLICATION SPECIFICATION
REVISION:
ECR/ECN INFORMATION:
TITLE:
2.4/5GHz BALANCE PCB ANTENNA
SHEET No.
E
EC No:
121094
9 of 11
DATE:
2017/09/05
DOCUMENT NUMBER:
CREATED / REVISED BY:
CHECKED BY:
APPROVED BY:
1461870100
Benson Liu 2017/09/05
Colin Xu 2017/09/05
Chris Zhong 2017/09/05
TEMPLATE FILENAME: APPLICATION_SPEC[SIZE_A](V.1).DOC
6.0 THE ANTENNA PERFORMANCE VARIATION WITH CABLE LENGTH
6.0.1 CABLE LOSS
ITEM
DESCRIPTION
TEST CONDITION
REQUIREMENT
6.0.1.1
Frequency Range
2 GHz~6GHz
2GHz~3GHz
5GHz~6.0GHz
6.0.1.2
Attenuation
1m cable measured by VNA5071C
≤3.5dB/m
≤5dB/m
6.0.2 CABLE LENGTH AFFECT THE ANTENNA PERFORMANCE
Balance antenna resonance is insensitive by cable’s length, but the cable’s loss will affect
the total efficiency. Refer to 6.0.1
6.0.3 FOR EXAMPLE
Base on the 100mm cable performance, we can mostly compute the 300mm cable’s.
100mm cable
300mm cable
Frequency
(MHz)
Efficiency
(dB)
Efficiency
(%)
cable loss
Efficiency
(dB)
Efficiency
(%)
X
X-LOSS=Y
Y
2400
-0.53
88.54
0.2m*3.5dB/m
-1.23
75.36
2410
-0.46
89.98
-1.16
76.58
2420
-0.54
88.37
-1.24
75.21
2430
-0.42
90.71
-1.12
77.21
2440
-0.48
89.47
-1.18
76.15
2450
-0.52
88.69
-1.22
75.49
2460
-0.54
88.24
-1.24
75.10
2470
-0.62
86.72
-1.32
73.81
2480
-0.77
83.80
-1.47
71.33
2490
-0.83
82.55
-1.53
70.26
2500
-0.84
82.36
-1.54
70.10