1999 Dec 23

7

Philips Semiconductors

Preliminary specification

High dynamic range dual LNA MMIC

CGY2105ATS

Table 1

List of components; see Figs 3 and 4

Table 2

Transmission lines; see Figs 3 and 4

Note

1. Transmission line lengths and widths in mm are valid for a double sided PCB; thickness of 0.8 mm in FR4 material

(

ε = 4.7).

COMPONENT

DESCRIPTION

VALUE

REFERENCE

C1, C2

decoupling capacitor

1 nF

Philips; NPO, 0603

C3, C4

decoupling capacitor

47 pF

Philips; NPO, 0603

C5, C6

decoupling capacitor

47 pF

Philips; NPO, 0603

R1, R2

drain biasing resistor

39

Ω

Philips; XR7, 0805

R3, R4

gate biasing resistor

15 k

Ω

Philips; 0603

R5, R6

gate biasing resistor

10 k

Ω

Philips; 0603

L1, L2

drain biasing inductor

18 nH

Coilcraft; 0603

COMPONENT

LENGTH IN

λ

TRL1, TRL2

100

Ω

0.08

λ at 1800 MHz

10 mm

0.25 mm

TRL3, TRL4

100

Ω

0.08

λ at 1800 MHz

4 mm

0.80 mm

TRL5, TRL6

100

Ω

0.08

λ at 1800 MHz

3.4 mm

0.80 mm