0915AT43A0026_13 Datasheet, PDF (2/3 Pages) Johanson Technology Inc. – High Frequency Ceramic Solutions, 915 MHz Antenna

"High Frequency Ceramic Solutions"
915 MHz Antenna
Detail Specification: 4/10/2013
Mounting Considerations II
Johanson Test Board
(orderable) p/n:
0915AT43A0026-EB1SMA
GND Plane
P/N 0915AT43A0026
Page 2 of 3
Recommended Application ISM
40mm
GND Plane
19mm (can be shortened as needed,
won't influence performance)
9.5mm
50Ω Feed Line
(make sure
proper
calculation are
applied to
achieve this.
Yellow area-
complete GND
and layer
clearance free
of metal below
and above.
**Note 2: It is recommended that the designer leave available slots for a "pi" (or shunt-
series-shunt) network. The antenna matching network values above are used when antenna
is mounted on Johanson's evaluation board. The matching values on client’s PCB will be
different. Go to: http://johansontechnology.com/tuning and see how to obtain the new
values. If you need further help, contact our RF Applications Eng. Team at:
Return Loss (with matching)
0
-5
m1
-10
m1m2
freq=902.0MHz
dB(S(1,1))=-11.217
-15
m2
freq=928.0MHz
-20
dB(S(1,1))=-11.807
m3
-25
freq=915.0MHz
dB(S(1,1))=-43.257
-30
-35
-40
m3
-45
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
freq, GHz
Johanson Technology, Inc. reserves the right to make design changes without notice. Please confirm the specifications
and delivery conditions when placing your order. All sales are subject to Johanson Technology, Inc. terms and conditions.
www.johansontechnology.com
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