Overview of Low-Cost GPS Antennas

Type 28367-00 GNAC1121A ANGD003A520 active GA26(3) Micro Mouse Mighty Mouse 2 Mighty Mouse
(see note 6)
Big Brother
(see note 7)
MK4 SM-25 SM-66 VIC1
dimensions (mm) 40x47x13 50x43x18 50x50x15 50x42x14 50x71x15 34x25x11 50x43x13 58x48x15 58x48x15 34x25x10.6 58x48x15 58x48x15 50x43x18.5
cable length (m) 5 6 5 5 2.5 3 5 5 5 3 5 5 6
mount magnetic magnetic magnetic magnetic/
screw down
magnetic/
suction
magnetic/
screw down
magnetic/
screw down
magnetic/
screw down
magnetic/
screw down
magnetic/
screw down
magnetic/
screw down
magnetic/
screw down
magnetic
connector SMB BNC SMB BNC BNC (see note 5) (see note 5) (see note 5) (see note 5) various (see note 8) (see note 5) many types
power 5V@25mA 5V@20mA 5V@30mA 5V@32mA 5V@30mA 3to5V@11mA 2.5to5V@5mA 5V@10mA 5V@28mA 3-5V@11mA 5V@12mA 5V@28mA 5V@25mA
gain (dB)(4) 23 (+) 24 (+) 25 (-) 23 (+) 15 (?) 24(+?) 29 (-), 22 (+) 26(?) 30(?) 24(+) 26(+) 30(+) 25 (+)
noise (dB) 1.6 1.8 2.5 1.6 2 2.0 max 1.6 typ 1.5typ,2.5max 1.5typ,2.5max 2max 2.5max 2.0max ?
gain pattern +3dB@90deg
-5dB@20deg
+3dB@90deg
0dB@30deg
-10dB@0deg
+2dB@90deg
-2dB>20deg
-6dB>15deg
+3dB@90deg
-5dB@20deg
+1.5dB@90deg
-1dB@45deg
-6dB@10deg
+5dB@90deg
-1dB@10deg
+3dB@90deg +5dB@90deg
-1dB@10deg
+5dB@90deg
-1dB@10deg
+5dB@90deg
-1dB@10deg
+5dB@90deg
-1deg@10deg
+5dB@90deg
-1deg@10deg
0dB>30deg
-7dB@0deg
axial ratio 4dB@90deg ? 3dB@90deg 4dB@90deg 3dB@90deg 3dB typ +3dB@90deg 3dBmax 3dBmax 3dBtyp 3dBmax 3dBmax ?
rejection 7dB@20MHz
12dB@30MHZ
20dB@50MHz
30dB@100MHz
25dB@100MHz 18dB@50MHz 7dB@20MHz
12dB@30MHz
20dB@50MHz
30dB@100MHz
15dB@50MHz
25dB@100MHz
LNA BW
2MHz
LNA BW
2.046MHz
? ? LNA BW
2MHz min
? ? ?
op.temp.range (C) -40/+85 -40/+100 -30/+85 -30/+80 -55/+85 -30/+85 -40/+80 -30/+85 -30/+85 -30/+85 -40/+85 -40/+85 ?
price (US$) 50 56 100 65 100 ? 89 59 59 AUS$95 43.70 42.60 ?

  1. Various other types available.
  2. Actual measurements by Lowe show a max current of 20.9 mA, a max noise figure of 1.38 dB and a min gain of 27.9 dB (Ref: Richard Mclachlan).
  3. Also available with MCX connector (GA 27) and marine (GA 28).
  4. Perferrably the overall gain (antenna + pre-amp + cable) is given. The following symbols are used:
  5. FME connector with adaptors to BNC, TNC, SMA, SMB, MCX included.
  6. Mighty Mouse is also available as a bulkhead version, it's called 'Skymaster'.
  7. Big Brother is also available as a re-radiator (with a car cigarette lighter connector for power supply), enabling the use of external antennas with receivers that don't support external antennas or don't supply +5VDC.
  8. BNC, TNC, FME, MMCX, MCX, SMA, SMB or SMC.


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