MICROWAVE CORPORATION
v02.0304
HMC137
GaAs MMIC BI-PHASE
MODULATOR, 6 - 11 GHz
Features
Chip Integrates Directly into MIC Designs
20 dB of Carrier Suppression
Direct Modulation in the 6 - 11 GHz Band
Functions also as a Phase Detector
Typical Applications
The HMC137 is suitable for:
鈥?Wireless Local Loop
鈥?LMDS & VSAT
鈥?Pt. to Pt. Radios
鈥?Test Equipment
Functional Diagram
General Description
The HMC137 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) de鏗乶es the phase states. Excel-
lent amplitude and phase balance provided by closely
matched monolithic balun and diode circuits delivers
20 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 sig-
nals 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.
6
MODULATORS - CHIP
Electrical Speci鏗乧ations,
T
A
= +25擄 C, 5 mA Bias Current
Parameter
Frequency Band
Insertion Loss
Return Loss, RF and LO Ports
Amplitude Balance
Phase Balacne
Carrier Suppression (When driven with a 1 MHz square wave, 1.4 Vp-p)
Input Power for 1 dB Compression
Third Order Intercept, Input
Second Order Intercept, Input
Bias Current (Bias current forward biases internal Schottky diodes providing approximately 0.6 V at
the control port).
15
4
10
25
2
2.5
Min.
Typ.
6 - 11
9
3.0
0.25
10
20
8
15
40
5
10
0.50
15
11
Max.
Units
GHz
dB
dB
dB
deg
dBc
dBm
dBm
dBm
mA
6 - 10
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
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