Datasheet

APPLICATION SPECIFICATION
REVISION:
ECR/ECN INFORMATION:
TITLE:
ISM 433MHz Flex Antenna
SHEET No.
A
EC No:
120458
7 of 13
DATE:
2017-08-10
DOCUMENT NUMBER:
CREATED / REVISED BY:
CHECKED BY:
APPROVED BY:
AS-2042870100
Benson Liu 2017/08/10
Chris Zhong 2017/08/10
Welson Tan 2017/08/10
TEMPLATE FILENAME: APPLICATION_SPEC[SIZE_A](V.1).DOC
4.2 ANTENNA RF PERFORMANCE AS A FUNCTION OF DIFFERENT DISTANCES WITH
PARALLEL GROUND
Four ground distances from the antenna with parallel ground have been evaluated, and these
distances are shown in figure 4.2. The 4 distances are as following: 20mm, 30mm, 40mm, 50mm.
The PCB ground size is 90mm*90mm and we move the PCB to four locations for each test.
According to the results, the minimum ground distance from antenna is recommended to be 50mm
to achieve acceptable antenna performance.
FIGURE 4.2 FOUR LOCATIONS WITH PARALLEL GROUND
Ground Area: 90mm*90mm;
Location 1: Distance between antenna and ground is about 20mm;
Location 2: Distance between antenna and ground is about 30mm;
Location 3: Distance between antenna and ground is about 40mm;
Location 4: Distance between antenna and ground is about 50mm.