Specifications

EMMY-W1 Antenna reference design
UBX-16015910 Page 8 of 12
locate, communicate, accelerate
5 Reference designs for antenna pin 2
This section describes the available designs for the antenna pin 2 of the EMMY-W1 modules.
Figure 6: Reference schematic for antenna pin 2
5.1 Internal antenna
The reference design with internal antenna uses the SMD Johanson Technology type 2450AT45A100 antenna
that is connected to the module RF-port via a coplanar micro-strip transmission line.
5.1.1 Bill of materials
Reference
designator
Description Manufacturer P/N
A2 Antenna CHIP 2.4-2.5GHz Johanson Technology 2450AT45A100
C3 CAP, CER, 2.2pF, +/-0.1pF, C0G, 50V, SMD 0402 Johanson Technology 500R07S2R2BV4
C4 CAP, CER, 1.8pF, +/-0.1pF, C0G, 50V, SMD 0402 Johanson Technology 500R07S1R8BV4
L3 IND, Multilayer Ceramic, 3.9nH, +/-0.3nH, 300mA, SMD 0402 Johanson Technology L-07C3N9SV6T
R9 0 Ω resistor, 0402 Generic -
R10 Do not Assembly - -
J8 Do Not Assembly - -
5.1.2 Antenna characteristics
Parameter Low band Unit
Frequency Range 2.4 – 2.5 GHz
Peak Gain 2.2 dBi
VSWR < 2:1 -
Polarisation Linear -
Radiation pattern Omnidirectional -
Temperature range -40 to +125 °C
Impedance 50
Ω
Dimension
(L x W x H)
9.5 x 2.0 x 1.2 mm