HMC137
v03.0304
GaAs MMIC BI-PHASE
MODULATOR, 6 - 11 GHz
Typical Applications
The HMC137 is suitable for:
• Wireless Local Loop
• LMDS & VSAT
• Point-to-Point Radios
• Test Equipment
Features
Chip Integrates Directly into MIC Designs
Carrier Suppression: 20 dB
Direct Modulation in the 6 - 11 GHz Band
Functions also as a Phase Detector
Die Size: 1.45 x 1.30 x 0.1 mm
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 out-
put 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 20 dB of carrier suppression in a tiny mono-
lithic 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.
5
MODULATORS - BI-PHASE - CHIP
Electrical Specifi cations,
T
A
= +25° C, 5 mA Bias Current
Parameter
Frequency Band
Insertion Loss
Return Loss, RF and LO Ports
Amplitude Balance
Phase Balance
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
5 - 14
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HITTITE [ HITTITE MICROWAVE CORPORATION ]
