CHV2242a
Q-band VCO based on Ku-band Oscillator
and Q-band Multiplier
GaAs Monolithic Microwave IC
Description
The CHV2242a is a monolithic multifunction for
frequency generation. It integrates a Ku-band
oscillator with frequency control (VCO), a Q-
band frequency multiplier and buffer amplifiers.
For performance optimisation, two external
ports (ERC1 and ERC2) allow a passive
resonator coupling to the oscillator (at one third
of output frequency). On chip Schottky diode,
based on a P-HEMT, is used as varactor. All the
active devices are internally self biased.
The circuit is manufactured with the P-HEMT
process : 0.25µm gate length, via holes through
the substrate, air bridges and electron beam
gate lithography.
It is available in chip form.
F_VCO = F_out/3
ERC1
MEDIUM Q
RESONATOR
ERC2
+V
-V
RF_out
x3
(F_out)
V_tune
Multifunction block diagram
38,7
Output frequency (GHz)
38,6
38,5
38,4
38,3
38,2
38,1
0
0,1
0,2
0,3
0,4
0,5
0,6
0,7
0,8
0,9
1
1,1
1,2
Main Features
n
Ku-band VCO + Q-band multiplier
n
On chip varactor
n
External resonator for centre frequency
control and phase noise optimisation
n
Low phase noise
n
Auxiliary output at VCO frequency
n
High temperature range
n
On-chip self biasing
n
Automatic assembly oriented
n
Chip size 2.41 x 1.18 x 0.1 mm
Tuning voltage (V)
Typical tuning characteristic
(coupled to a micro-strip filter
Main Characteristics
Tamb = +25°C
Symbol
F_out
F_vco
F_tune
Pout
Parameter
Min
38
150
5
Typ
38.25
F_out/3
200
7
MHz
dBm
Max
38.5
Unit
GHz
Output centre frequency
Oscillator frequency
Output frequency tuning range
Output power
ESD Protections : Electrostatic discharge sensitive device observe handling precautions !
Ref. : DSCHV22421074 -15-Mar.-01
1/8
Specifications subject to change without notice
united monolithic semiconductors S.A.S.
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 ]
