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PDF CHV2240 Data sheet ( Hoja de datos )
| Número de pieza | CHV2240 | |
| Descripción | Multifunction : K-band VCO and Q-band Multiplier | |
| Fabricantes | United Monolithic Semiconductors | |
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CHV2240
Multifunction : K-band VCO and Q-band Multiplier
GaAs Monolithic Microwave IC
Description
The CHV2240 is a monolithic multifunction
proposed for frequency generation at
38GHz. It integrates a K-band Voltage
Controlled Oscillator, a Q-band frequency
multiplier and buffer amplifiers. For
performance optimisation, an external port
(ERC) allows a passive resonator coupling
to the oscillator (at half output frequency).
This chip has been especially designed to
be coupled to a high Q dielectric resonator.
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.
Main Features
n K-band VCO + Q-band frequency
multiplier
n External resonator for centre frequency
control and phase noise optimisation
n High quality oscillator when coupled to
a dielectric resonator
n On-chip varactor for electronic control
n Chip size 2.68x1.4 x 0.1 mm
+V -V
F_out/2
HIGH Q
ERC
RESONATOR
RF_out
x2
(F_out)
V_tune
Multifunction block diagram
38,204
38,202
38,2
T=-40°C
38,198
38,196
38,194
T=+25°C
T=+100°C
38,192
38,19
0
0,2 0,4 0,6 0,8 1 1,2 1,4 1,6 1,8
Vtune (V)
Typical tuning characteristic
2
Main Characteristics
Tamb = +25°C
Symbol
Parameter
F_out Output frequency
F_t Frequency tuning range (high Q resonator)
Pn Oscillator phase noise @ 100kHz (38GHz)
Pout Output power
Min Typ Max Unit
37.5 38.25 39 GHz
5 MHz
-100
dBc/Hz
9 dBm
ESD Protections : Electrostatic discharge sensitive device observe handling precautions !
Ref. :DSCHV22400096 -05-Apr-00
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
1 page  
K-band VCO / Q-band Multiplier
CHV2240
Proposed external high Q resonator
This chip has been especially designed to be coupled to a high Q
dielectric resonator. The resonance is given by a dielectric cylinder coupled to a
50Ω line. The size of the resonator gives the centre frequency and the space
between the resonator and the line gives the loaded quality factor. The following
drawing shows an example of external configuration.
Alumina substrate : thickness=250µm
Dielectric
resonator
50 Ohm resistance
d
via hole 2xl
3xl
4 5 6 7 8 9 10 11 12 13 14
3
2
1
15
16
17
Additional information
n Resonator reference example = MURATA /DRD036EC016. As the
exact frequency is given by the resonator size but also by the
environment (cavity size, substrate characteristics, parasitic couplings
…), the final dimensions of the resonator have to be defined according
to the definitive module design. Other kind of resonators can be used
(from TEKELEC or TRANS-TECH). The temperature coefficient has to
be chosen according to the environment.
n Resonator coupling : d=0.2 to 0.3mm , l=1.5mm (quarter wave).
These values have been used in the test fixture, of course they can be
modified if the environment is different. The distance between the
resonator and the edge of the substrate (close to MMIC) is proposed
to be 3xl=4.5mm (3 quarter waves), theoretically only one is necessary
but in this case the distance between resonator and MMIC is too low
for automatic assembly.
n 50Ω line width on alumina (heigth=0.25mm) = 0.238mm
n 50Ω load on alumina : this load has to be as good as possible (low
parasitic inductance).
n Cavity size (mm) : 18 x 17 x 7
Ref. :DSCHV22400096 -05-Apr-00 dd-Mmm-yy
5/8
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
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet CHV2240.PDF ] | |
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