A10137 TDK Corporation, A10137 Datasheet - Page 10

• Manufacturer Part Number: A10137
• Description: ANTENNA, GPS CHIP, SMD, 1575MHZ
• Manufacturer: TDK Corporation

Specifications of A10137

• Frequency Coverage: GPS
• Termination Type: SMD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

10 Electrical interface
10-1 Transmission lines
10-2 Matching circuit
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Once the material for the PCB has been chosen (PCB thickness and dielectric constant), a co-
planar transmission line can easily be designed using any of the commercial software
packages for transmission line design. For the chosen PCB thickness, copper thickness and
substrate dielectric constant, the program will calculate the appropriate transmission line width
and gaps on either side of the track so the characteristic impedance of the coplanar
transmission line is 50 Ω.
The antenna requires a matching circuit that must be optimized for each customer’s product.
The matching circuit will require up to three components and the following pad layout should be
designed into the device so the correct circuit can be installed:
The antenna feed pad and the antenna ground pads are indicated in the drawing above.
Additional pads are for mechanical attachment only and should not be grounded.
In addition to the matching circuit, a separate DC blocking capacitor will also be required
between the radio and the antenna matching circuit.
All transmission lines should be designed to have a characteristic impedance of 50 Ω
The length of the transmission lines should be kept to a minimum
Any other parts of the RF system like transceivers, power amplifiers, etc, should also be
designed to have an impedance of 50 Ω
Integrated Antenna Solutions
Cyaneus GPS Co-planar Antenna
Product Specification 06MD-0001-7-PS
Part No. A10137
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