Applications

Features

Benefits

• Anti-Jamming GPS
• Mission Critical GPS Timing
• Military & Security
• Network Timing and Synchronisation
• Very low Noise LNA, <2 dB
• Axial ratio: 1dB typ, at zenith.
• Mid range LNA gain: 35 dB typ.
• Low current: 25 mA typ.
• ESD circuit protection: 15 KV
• Wide voltage input range: +2.5 to 16 VDC
• Ideal for L1/L2 RTK surveying systems
• Great multipath rejection
• Increased system accuracy
• Great signal to noise ratio
• RoHS compliant

Patch Architecture

Circular, Dual Feed, Dual Stacked Patch

Gain (100mm ground plane), 1227.6-1246MHz

3 dBic Min at Zenith on 100mm Ground Plane

(100mm ground plane), 1575.42MH-1606MHz

4.5 dBic Min at Zenith on 100mm Ground Plane

Axial Ratio, over full bandwidth, both L1 & L2

<3 dB at 90°

L2, 1dB Bandwidth,

1227MHz-1250MHz

L1, 1dB Bandwidth,

1575MHz–1606MHz

Polarization

RHCP, L1 and L2

Bandwidth at L2

1213MHz-1261MHz (Filter bandwidth)

Bandwidth at L1

1571MHz-1614MHz (Filter bandwidth)

Overall LNA Gain

35dB typ, 32 dB min, each of L1 and L2 Bands,

Gain Variation with Temperature.

3dB over operational temperature range

LNA Noise Figure

2dB max at 25°C

VSWR (at LNA input)

<1.5:1

Supply Voltage Range

+2.5 to 16 VDC nominal, up to 50mV p-p ripple

EMI Immunity

50V/Meter, excepting L1+/-100MHz and L2 +/-100MHz

Supply Current

25mA typ. at 25°C.

ESD Circuit Protection

15 KV air discharge

Out-of-Band Rejection: L1

<1500 MHz >50 dB
<1550 MHz >36 dB
>1640 MHz >60 dB

Out-of-Band Rejection: L2

<1184 MHz >50 dB
<1200 MHz >30 dB
>1284 MHz >32 dB

Mechanical Size

60mm diameter, 0.75mm thick, see mechanical drawing

Operating Temp. Range

-40 to +85 °C

Weight

150 g

Attachment Method

Through hole screws in ground plane

Environmental

RoHS compliant

Shock

Vertical axis: 50 G, other axes: 30 G

Vibration

3 axis, sweep = 15 min, 10 to 200 Hz sweep: 3 G

Warranty

One year, parts and labour

TW3805

32-3805-xx-yyyy-zz

Connector: xx

00=SMA male, 01=TNC male, 02=MCX male, 03=MMCX male, 04=SMB male
05=MCX right angle male, 06=MMCX right angle male, 07=SMA female, 08 = H.FL (call for pricing)
09=U.FL, 10=SMA R/A (add $2.95 to unit price), 11=Reverse polarity SMA (add $5.00 to unit price)

Cable length:

yyyy = cable length in mm

Custom Tuning:

zz = Assigned by Tallysman