Page 1
MICROWAVE CORPORATION
GaAS MMIC BI-PHASE MODULATOR 4 - 8 GHz
HMC136
5
MODULATORS
DIE
FEBRUARY 2001
Features
CHIP INTEGRATES DIRECTLY INTO MIC DESIGNS
30 dB OF CARRIER SUPPRESSION
DIRECT MODULATION IN THE 4 - 8 GHz BAND
FUNCTIONS ALSO AS A PHASE DETECTOR
V01.0300
General Description
The HMC136 Bi-Phase Modulator is designed
to phase-modulate an RF signal into reference
and 180 degree states. Device input is at the RF
port and output is at the LO port. The polarity of
the bias current at the control port (IF port)
defines the phase states. Excellent amplitude
and phase balance provided by closely matched
monolithic balun and diode circuits delivers 30
dB of carrier suppression in a tiny monolithic
chip.
The device also functions as a demodulator or
phase comparator. As a demodulator, data
emerges at the control port when a modulated
signal at the RF port is compared to a reference
signal at the LO port. As a phase comparator,
the phase angle between two signals applied to
the RF and LO ports is represented by an analog
voltage at the control port.
Except for carrier suppression, the data presented here was measured under static conditions in which a DC bias current (nominally 5
mA) is applied to the control port.
Guaranteed Performance, For 5mA Bias Current , -55 to +85 deg C
Parameter Min. Typ. Max. Units
Frequency Band 4-8 GHz
Insertion Loss 810dB
Return Loss,RF and LO Ports 2.5 3.0 dB
Amplitude Balance 0.1 0.5 dB
Phase Bal ance 4.0 6.0 deg
Carrier Suppression (When driven with a 1 MHz square wave, 1.4 Vp-p) 25 30 dBc
Input Power for 1 dB Compression 4 8 dBm
Third Order Intercept, Input 10 15 dBm
Second Order Intercept, Input 25 35 dBm
Bias Current (Bias current forward biases internal Schottky diodes
providing approximately 0.6 V at the control port).
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Web Site: www.hittite.com
5 - 6
2510mA
Page 2
MICROWAVE CORPORATION
HMC136 BI-PHASE MODULATOR 4 - 8 GHz
HMC136
V01.0300
Insertion Loss
0
-5
-10
-15
INSERTION LOSS (dB)
-20
34
5
6789
FREQUENCY (GHz)
Phase Balance
10
8
6
4
2
0
-2
-4
-6
PHASE BALANCE (Deg)
-8
-10
3456789
FREQUENCY (GHz)
FEBRUARY 2001
Amplitude Balance
2
1
0
-1
AMPLITUDE BALANCE (dB)
-2
3456789
FREQUENCY (GHz)
Carrier Suppression
(For 1.4 Vp-p Square Wave Modulation at 1 MHz)
50
40
30
20
10
CARRIER SUPPRESSION (dBc)
0
4 5 678
CARRIER FREQUENCY (GHz)
5
MODULATORS
DIE
Return Loss
0
-5
-10
-15
RETURN LOSS (dB)
-20
012345678910
FREQUENCY (GHz)
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Web Site: www.hittite.com
5 - 7
Page 3
MICROWAVE CORPORATION
0
5
10
15
20
25
INPUT
THIRD ORDER INTERCEPT (dBm)
012345678910
BIAS CURRENT (mA)
HMC136 BI-PHASE MODULATOR 4 - 8 GHz
HMC136
5
FEBRUARY 2001
Compression vs Frequency
(For 5 mA Bias Current)
12
10
8
6
4
INPUT POWER FOR
2
1 dB COMPRESSION (dBm)
0
45678
CARRIER FREQUENCY (GHz)
Third Order Intercept vs Frequency
MODULATORS
(For 5 mA Bias Current)
V01.0300
Compression vs Bias at 6GHz
14
12
10
8
6
4
2
INPUT POWER FOR
1 dB COMPRESSION (dBm)
0
0 1 2 345 678 910
BIAS CURRENT (mA)
Third Order Intercept vs Bias at 6 GHz
DIE
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Web Site: www.hittite.com
5 - 8
Page 4
MICROWAVE CORPORATION
HMC136 BI-PHASE MODULATOR 4 - 8 GHz
HMC136
V01.0300
Schematic
IN
(RF)
DC I/O
(IF)
Outline
( See DIE Handling, Mounting, Bonding Note Page 8 - 3 )
OUT
(LO)
TTL
Suggested TTL Driver
for a Bi-Phase Modulator
+5 Vdc
VCC
HCT04
VZ= 2V
GND
NOTES
ALTERNATES BETWEEN
1) V
A
± 2.4 V
dc
± IA = 2.4 - 0.6 = ± 5 mA
360 Ω
2.2K
VCC
+2.5 Vdc
HC04
GND
-2.5 Vdc
FEBRUARY 2001
.01 uF
*R
V
2) HCT04 and HC04 are QMOS HEX
1
A
I
A
.01 uF
INVERTERS.
= 300 TO 620 ± 2% SELECT R
*R
1
TO SUPPLY ± 3 TO ±6 mA TO THE
IF PORT
MODULATOR
I, Q PORTS
HITTITE
MODULATOR
0.6V
5
1
DIE THICKNESS IS 0.100 (0.004), BACKSIDE IS GROUND
BOND PADS ARE 0.100 (0.004), SQUARE
ALL DIMENSION ARE IN MILLIMETERS (INCHES)
BOND PAD METALLIZATION : GOLD
BACKSIDE METALLIZATION : GOLD
ALL TOLERANCES ARE ±0.025 (0.001)
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Web Site: www.hittite.com
5 - 9
MODULATORS
DIE
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