DAKC1575MS74T
GPS DIELECTRIC PATCH ANTENNA
Description
The TOKO #DAKC1575MS74T is a low profile, dielectric antenna
element specifically designed for 1575.42 MHz L1 GPS applications.
The flat patch antenna incorporates a rectanglar micro-strip design
for GPS C/A right-hand circular polarization wave reception. The
#DAKC1575MS74T has excellent stability and sensitivity through
the use of high performance ceramic materials well suited for GPS
applications and ships with double-sided adhesive tape for ease in
mounting to the ground plane.
Features
•
•
•
•
•
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Range of Receiving Freq: 1575.42±1.023 MHz
Center Frequency: 1580.5 MHz with 70mm
2
GND plane
1
Bandwidth: 9 MHz min. (Return Loss ≤ -10 dB)
Miniature footprint: 25mm x 25mm
Low Profile: 4.5mm
Gain (Zenith 90°): +5 dBi (typ.)
Gain (10° Elevation): -1 dBi (typ.)
Impedance: 50
Ω
Freq. Temperature Coefficient: 0±20ppm/°C max.
Operation Temperature: - 40°C to +105°C
Storage Temperature: - 40°C to +105°C
Lead-free terminated electrode
(Part No. #DAKC1575MS74T)
Dimensions
25
0.5Max.
3-R0.5
25
1.9
1.7
4
ø0.8
(Unit: mm)
3.3
C2
Typical Characteristics
Return Loss
½½½½½
½½
½½½½½½½
½½½½
½½½½½½½
½½½½½ ½½½½½½½½½
½
½½½½½½½½½
½½½½½½½½½½½½
½½½½½½½½½½½½½½½
½½½
½½½½½½½½½
½½½½½½½½½½½½½½½½½½
Directivity Charts
30
60
00
3
6
10
330
30
300
60
00
3
6
10
330
300
15
20
½½½½½½½½½½½½½½½½½½½½½½½½
15
20
270 90
25
270
90
25
½
½
120
240
120
240
150
½
180
210
150
180
210
½
½½½½½½
½½½½½½½½½
½½½½½½½½½½½½½½½½
TX: Right Hand Circular Polalized Signal
Frequency = 1580.5MHz
Measured with 70mm sq. ground plane
NOTE 1:
Center frequency is shifted approximately 5MHz down when covered with radome.
The information furnished by TOKO, Inc. is believed to be accurate and reliable. However, TOKO reserves the right to make changes or improvements in the design, specification or manufacture
of its products without further notice. TOKO does not assume any liability arising from the application or use of any product or circuit described herein, nor for any infringements of patents or
other rights of third parties which may result from the use of its products. No license is granted by implication or otherwise under any patent or patent rights of TOKO, Inc.
TOKO America, Inc.
1250 Feehanville Drive, Mount Prospect, Illinois 60056
Tel: (847) 297-0070 Fax: (847) 699-7864 Web: http://www.tokoam.com
April 2005
© 2005 TOKO America, Inc.
All Rights Reserved
Printed in USA
CF-293-DAKC1575
R-LOG0405A
1
Analogue and Mixed Signal
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