Q-band VCO
External Resonator Coupling Information
CHV2242c
The external resonator has to be an equivalent band-pass filter with 180°
insertion phase at resonance (oscillation) frequency. However, this filter must be
compatible to the loop parameters of the oscillator (between ERC ports) in order
to obtain the oscillation conditions and to avoid parasitic oscillations. The
following information concerns the S parameters of the chip (plots for S21 and
tables for the four parameters), reference ports are ERC1 and ERC2. These
values don’t include the wire bonding equivalent inductance L_erc1 and L_erc2
given in section “Typical Assembly and Bias Configuration”. For more detail and
for a wider band analysis a complete S parameter file is available on request.
MMIC S21 for V_tune=0V (between ERC1 and ERC2)
freq
11
11.25
11.5
11.75
12
12.25
12.5
12.75
13
13.25
13.5
13.75
14
14..25
dB(S11)
-4.76
-5.98
-7.56
-8.71
-8.22
-6.62
-5.06
-3.88
-3.04
-2.45
-2.01
-1.67
-1.46
-1.28
Phase(S11)
-120.8
-143.0
-172.9
147.5
105.0
71.3
47.3
29.9
16.5
6.0
-2.6
-9.7
-15.9
-21.2
dB(S21)
6.28
6.73
7.035
7.10
6.86
6.34
5.63
4.80
3.95
3.10
2.30
1.54
0.82
0.16
Phase(S21)
-136.9
-152.2
-168.3
175.1
158.7
143.4
129.5
117.3
106.6
97.1
88.6
81.0
73.9
67.4
dB(S12)
-24.28
-23.66
-23.17
-22.94
-23.01
-23.36
-23.91
-24.58
-25.23
-25.97
-26.62
-27.23
-27.80
-28.31
Phase(S12)
135.4
120.9
105.6
89.7
74.0
59.3
46.1
34.4
24.2
15.3
7.3
0.2
-6.4
-12.6
dB(S22)
-10.50
-10.96
-11.18
-10.95
-10.34
-9.64
-9.06
-8.67
-8.43
-8.31
-8.28
-8.30
-8.37
-8.47
Phase(S22)
-39.2
-36.4
-31.7
-26.5
-23.1
-22.4
-23.7
-25.8
-28.2
-30.7
-32.9
-35.0
-36.8
-38.5
Ref. : DSCHV2242c6354 - 20 Dec 06
7/9
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
UMS [ UNITED MONOLITHIC SEMICONDUCTORS ]
