Overview of GPS Antennas - acad-antenna.co.il

1

Overview of GPS Antennas

Prof. Ely Levine

AFEKA Tel Aviv College of Engineering Israel

2

Satellite

Antennas

3

Receive Antennas at Different Sizes

Helix Microstrip Dielectric Chip

4

Fixed / Mobile (High End)

SATIMO

5

Airborne / Shipborne

High Quality Axial Ratio

6

Airborne / Shipborne

7

Coil

8

Quad Helix

9

Quad Helix

10

Miniature Quad Helix

SARANTEL

11

Miniature Quad Helix

SARANTEL

12

Microstrip Patch -

Natural Choice in

small Terminals

UBLOX

13

Large Patch

SENSOR SYSTEMS

14

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

15

Small Patch (25x25 or 18x18 mm)

INPAQ

16

Small Patch (25x25 or 18x18 mm)

INPAQ

17

Patch

18

Development Kit (5 frequencies)

TAOGLAS

19

Dual

spiral

ANTENOVA

20

Chip Antenna

PULSE

21

Fractal Antenna

FRACTUS

22

Variation of Axial Ratio with Cross Polar signal level

0

1

2

3

4

5

6

7

8

9

10

11

12

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

23

-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

24

Cross Pol

25

Choke Ring – Reduces AR

LEICA

26

Multi-Frequency

NOVATEL