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Overview of GPS Antennas

Prof. Ely Levine

AFEKA Tel Aviv College of Engineering Israel

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Satellite

Antennas

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Receive Antennas at Different Sizes

Helix Microstrip Dielectric Chip

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Fixed / Mobile (High End)

SATIMO

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Airborne / Shipborne

High Quality Axial Ratio

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Airborne / Shipborne

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Coil

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Quad Helix

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Quad Helix

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Miniature Quad Helix

SARANTEL

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Miniature Quad Helix

SARANTEL

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Microstrip Patch -

Natural Choice in

small Terminals

UBLOX

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Large Patch

SENSOR SYSTEMS

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二二二二、、、、介质天线介质天线介质天线介质天线 Dielectric Antenna

中心频率Center Frequency 1575.42MHz±3 MHz

电压驻波比V.S.W.R 1.5:1

带宽Band Width ±5 MHz

阻抗Impendence 50 ohm

最高增益Peak Gain 3dBic Based on 7×7cm ground plane

增益范围Gain Coverage ＞-4dBic at –90°＜0＜+90°(over 75% Volume)

天线极化Polarization RHCP

一产品型号产品型号产品型号产品型号Product Model BBTGPS-B2

Large Patch

BOBOTO

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Small Patch (25x25 or 18x18 mm)

INPAQ

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Small Patch (25x25 or 18x18 mm)

INPAQ

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Patch

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Development Kit (5 frequencies)

TAOGLAS

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Dual

spiral

ANTENOVA

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Chip Antenna

PULSE

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Fractal Antenna

FRACTUS

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Variation of Axial Ratio with Cross Polar signal level

0

1

2

3

4

5

6

7

8

9

10

11

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5 10 15 20 25 30 35 40

Cross Polar Signal Level/dB

Axial Ratio/dB

Axial Ratio/dB

(Axial Ratio/dB) .פולי

Axial Ratio and Cross Pol

Cross Pol = (√√√√AR–1)²/ (√√√√AR+1)²

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-40

-35

-30

-25

-20

-15

-10

-5

0

5

10

-180 -150 -120 -90 -60 -30 0 30 60 90 120 150 180

Angle (degrees)

Absolute G

ain ( dBiC

)

Co-Polar

X-Polar

Model HOA3-159L-ACT/1409

Meas Plane Elevation

Peak Gain 2.2 dBiC

Frequency 1.6605 GHz

Axial Ratio and Cross Pol

European Antennas

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Cross Pol

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Choke Ring – Reduces AR

LEICA

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Multi-Frequency

NOVATEL