5/26/2018 Reciprocity and Other Antenna Characteristics

1/11Reciprocity 1

Reciprocity

NETWK+V

_

A B

NETWK+V

_

A B

I

TWO

ANTA B

5/26/2018 Reciprocity and Other Antenna Characteristics

2/11Reciprocity 2

Antenna BAntenna A

Transmit on A Receive on B

Transmit on B Receive on A

SamePattern for

Antenna A

SAME

5/26/2018 Reciprocity and Other Antenna Characteristics

3/11Reciprocity 3

Polarization

Linear

Circular

TR kPP TR kPP dBkPP TR 3 0RP

45o

Minor Axis

Major Axis

Right-Hand Left-Hand

E

AR=Axial Ratio

= Major / Minor

EEE

5/26/2018 Reciprocity and Other Antenna Characteristics

4/11Reciprocity 4TR

kPP 0RP

dBkPP TR 3

RH or LH RH or LH

LH

RHRH

RH

5/26/2018 Reciprocity and Other Antenna Characteristics

5/11Reciprocity 5

To get CP from 2 LP Antennas

LHP090I

00I

LH RH

Linear

Pol

To get LP from 2 CP Antennas

5/26/2018 Reciprocity and Other Antenna Characteristics

6/11Reciprocity 6

4

4

(thin)4280 jZin

001.0a

dBi15.2spacefreeinGain

Dipoles

or Half Wave Dipoles

2

I

5/26/2018 Reciprocity and Other Antenna Characteristics

7/11

Reciprocity 7

5/26/2018 Reciprocity and Other Antenna Characteristics

8/11

Reciprocity 8

5/26/2018 Reciprocity and Other Antenna Characteristics

9/11

Reciprocity 9

5/26/2018 Reciprocity and Other Antenna Characteristics

10/11

Reciprocity 10

5/26/2018 Reciprocity and Other Antenna Characteristics

11/11

Reciprocity 11