CHR2244

5.8 GHz One Antenna Reflective Tag

Ref. : DSCHR2244QDG5053 - 22 Feb 05

14/16

Specifications subject to change without notice

Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE

Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09

3 - In the UPLINK MODE (figure 4a), the received CW carrier (F0) is multiplied with the modulation

signal (Fm) coming from MOD input. In fact, if ETSI CEN TC278 recommendation is applied, the

modulation is around the sub-carrier Fm. The resulting reflected signal is a transposition of Fm around the

carrier F0 (F0 ± Fm) .

Det

T/R

Vcc

modulated

2MHz sub-

carrier

WK_in

Vcc

DATA_out

Vcc

SB_out

RF in

5.8GHz

CW

Data from controller

RF out

product of

5.8GHz

X

modulated

sub-carrier

RF-in

TR

3V

WKIN

3V

RF_out

Spectrum

modulated sub-carrier

around carrier

CARRIER

Figure 4a : Uplink mode

RF

5,8GHz

ATTENUATOR

SPECTRUM ANALYSER

CHR2244

+V

T/R

MOD

IF 500kHz

Figure 4b : Uplink test bench diagram