HMC454ST89_07 Datasheet, PDF (11/12 Pages) Hittite Microwave Corporation – InGaP HBT ½ WATT HIGH IP3 AMPLIFIER, 0.4 - 2.5 GHz

v04.0907
HMC454ST89 / 454ST89E
InGaP HBT ½ WATT HIGH IP3
AMPLIFIER, 0.4 - 2.5 GHz
9
Alternative 900 MHz Application Circuit, Optimal OIP3 Layout
This alternate application circuit for 900 MHz applications features a resonating I/O structure on the PCB that, while
using more PCB area, will improve output IP3 from +40 dBm to +42 dBm. This circuit will satisfy many applications
from 700 to 1200 MHz as the typical performance below demonstrates. Contact the HMC Applications Group for
assistance in optimizing performance for your application.
TL1
TL2
Impedance
50 Ohm 50 Ohm
Physical Length
0.35”
0.05”
Electrical Length
18°
2.5°
PCB Material: 10 mil Rogers 4350, Er = 3.48
TL3
50 Ohm
0.53”
27°
Broadband Gain & Return Loss
25
20
15
10
S21
S11
5
S22
0
-5
-10
-15
0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4
FREQUENCY (GHz)
Recommended Component Values
L1
18 nH
C1
4 pF
C2, C6
10 pF
C3
3 pF
C4
100 pF
C5
2.2 μF
Output IP3 & P1dB
50
45
40
35
IP3
P1dB
30
25
20
0.7
0.8
0.9
1
1.1
1.2
FREQUENCY (GHz)
9 - 230
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: [phone] Fax: [phone]
Order On-line at www.hittite.com