Datasheet

APPLICATION SPECIFICATION
REVISION:
ECR/ECN INFORMATION:
TITLE:
GPS L1/L2 36mm Stacked Patch Sing Feed
Application Specification
SHEET No.
A
EC No:
623029
29 of 33
DATE:
2019/08/26
DOCUMENT NUMBER:
CREATED / REVISED BY:
CHECKED BY:
APPROVED BY:
AS-2136020001
Liu Hai 2019/08/21
Cheng Kang 2019/08/21
Andy Zhang 2019/08/21
TEMPLATE FILENAME: APPLICATION_SPEC[SIZE_A](V.1).DOC
5.4 RF PERFORMANCE AS A FUNCTION OF DIFFERENT DISTANCE BETWEEN
HORIZONTAL PLASTIC COVER AND ANTENNA
An evaluation was done with 5 different distances from antenna to the horizontal plastic cover
(50mm x 50mm x 2mm). The 5 distances are as following: 0mm、3mm、5mm、7mm、10mm.
From the study, we recommend that a plastic cover (50mm x 50mm x 2mm) should be placed at
least 3mm away from the antenna. When the distance is less than 3mm, the antenna performance
will be significantly degraded. Refer to figure 5.4.1-5.4.8.
FIGURE 6.4 PLASTIC COVER POSITIONS
Plastic Cover Size: 50mm*50mm*2mm;
Location 1: Distance between PCB and plastic cover (GAP) ground is about 0 mm;
Location 2: Distance between PCB and plastic cover (GAP) ground is about 3 mm;
Location 3: Distance between PCB and plastic cover (GAP) ground is about 5 mm;
Location 4: Distance between PCB and plastic cover (GAP) ground is about 7 mm;
Location 5: Distance between PCB and plastic cover (GAP) ground is about 10 mm;