uaa1570hl NXP Semiconductors, uaa1570hl Datasheet - Page 19

• Manufacturer Part Number: uaa1570hl
• Description: Global Positioning System Gps Front-end Receiver Circuit
• Manufacturer: NXP Semiconductors

Philips Semiconductors
7.1.6
The RF match has an important effect on the gains, noise figure, and dynamic characteristics of the RF system blocks.
Reflection coefficients better than 15 dB are easily attainable and can be improved to better than 25 dB with attention
to details.
In the following graph (see Fig.10) the solid trace G
UAA1570HL LNAs as measured on a spectrum analyzer, while the dotted and dashed results were obtained using a
noise figure meter over a more restricted frequency range.
1999 May 10
Global Positioning System (GPS) front-end
receiver circuit
(1) Fundamental output.
(2) 3rd-order product output.
(3) 2nd-order product output.
(1) LNA gain (dB).
(2) Power gain.
(3) Noise figure.
Fig.10 Typical LNA gain and noise figure as a function of frequency (50
G
Fig.9 Typical LNA fundamental, 2nd and 3rd-order product output levels as a function of input level.
ENERAL REMARKS AND RESULTS
output).
handbook, halfpage
handbook, halfpage
output
(dBm)
G LNA
(dB)
100
20
20
40
60
80
30
20
10
10
0
0
90
0
70
(3)
(2)
LNA
1000
(dB) represents the measured frequency response of the
19
50
1575.42
(1)
(1)
2000
30
f (MHz)
input (dBm)
(2)
MHB273
MHB272
15.3
3.68
(3)
3000
power matched on the input and
10
UAA1570HL
Product specification