MQH-2R58R5 [MARKIMICROWAVE]
MMIC 2.5-8.5GHz Quadrature Hybrid;
| 型号： | MQH-2R58R5 |
| 厂家： | 
Marki |
| 描述： | MMIC 2.5-8.5GHz Quadrature Hybrid |
| 文件： | 总12页 (文件大小：501K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MMIC 2.5-8.5GHz Quadrature Hybrid
1 Device Overview
MQH-2R58R5
1.1 General Description
The MQH-2R58R5 is a MMIC 2.5 GHz – 8.5 GHz quadrature (90°)
hybrid. Wire bondable 50Ω terminations are available on-chip.
Passive GaAs MMIC technology allows production of smaller
constructions that replace larger form factor circuit board
constructions. Tight fabrication tolerances allow for less unit to unit
variation than traditional quadrature hybrid technologies. The MQH-
2R58R5 is available as a wire bondable chip or connectorized
module. Low variation allows for accurate simulations using the
provided S4P file taken from measured production units. Applications
include single sideband upconverters, image rejection
Bare Die
Module
downconverters, IQ modulators, balanced amplifiers, microwave
correlators, and microwave Butler matrices.
1.2 Features
▪ Designed for S/C-band applications
▪ Excellent amplitude and phase balance
▪ High isolation
▪ Low insertion loss
▪ On-chip 50Ω load terminations
▪ S4P data: MQH-2R58R5UB.zip
1.3 Functional Block Diagram
90° Output
0° Output
Input
Isolated
1.4 Part Ordering Options1
Part
Green
Status
Product
Lifecycle
Export
Classification
Description
Number
Package
MQH-
Wire bondable die
2R58R5CH
CH
UB
RoHS
RoHS
Active
Active
EAR99
EAR99
MQH-
Connectorized
2R58R5UB
1
Refer to our website for a list of definitions for terminology presented in this table.
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3.4
MQH-2R58R5
Typical Performance Plots ........... 6
Table of Contents
4
5
Application Information ...................... 7
Die Mounting Recommendations ....... 10
1
Device Overview ............................... 1
5.1
Mounting and Bonding
1.1
General Description.................... 1
Features ................................... 1
Functional Block Diagram ............ 1
Part Ordering Options................. 1
Recommendations .............................. 10
1.2
1.3
1.4
5.2
5.3
Handling Precautions ................ 10
Bonding Diagram ...................... 11
5.3.1
5.3.2
Four Port Device ............... 11
Isolated Port Terminated..... 11
2
3
Port Configurations and Functions ...... 3
2.1
2.2
Port Diagram............................. 3
Port Functions ........................... 3
6
Mechanical Data............................. 12
6.1
6.2
CH Package Outline Drawing ..... 12
UB Package Outline Drawing...... 12
Specifications ................................... 5
3.1
Absolute Maximum Ratings.......... 5
Package Information.................... 5
Electrical Specifications .............. 5
3.2
3.3
3.3.1
Connectorized Package......... 5
Revision History
Revision Code
Comment
Datasheet Initial Release
Revision Date
August 2018
-
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MQH-2R58R5
2 Port Configurations and Functions
2.1 Port Diagram
A top-down view of the MQH-2R58R5CH package outline drawing is shown below. This
MMIC quadrature hybrid is a passive reciprocal device allowing any port to be used as the
input. Ports 1 – 4 correspond to the UB package designation.
50Ω
Termination
4 pc
2.2 Port Functions2
Configuration Configuration
Port
Description
Equivalent Circuit
A
B
Port 1 is DC short to port
2 and open to ground.
Port 1
Input
0° Output
Port 2 is DC short to port
1 and open to ground.
Port 2
Port 3
Port 4
Pad
0° Output
90° Output
Isolated
Input
Isolated
Port 3 is DC short to port
4 and open to ground.
Port 4 is DC short to port
3 and open to ground.
90° Output
Ground
CH package ground path is
provided through the
substrate and ground bond
pads.
Ground
2
Each configuration describes a different application of the same product.
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MQH-2R58R5
Configuration Configuration
Port
Description
Equivalent Circuit
C
D
Port 1 is DC short to port
2 and open to ground.
Port 1
90° Output
Isolated
Port 2 is DC short to port
1 and open to ground.
Port 2
Port 3
Port 4
Pad
Isolated
Input
90° Output
0° Output
Input
Port 3 is DC short to port
4 and open to ground.
Port 4 is DC short to port
3 and open to ground.
0° Output
Ground
CH package ground path is
provided through the
substrate and ground bond
pads.
Ground
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MQH-2R58R5
3 Specifications
3.1 Absolute Maximum Ratings
The Absolute Maximum Ratings indicate limits beyond which damage may occur to the
device. If these limits are exceeded, the device may be inoperable or have a reduced
lifetime.
Parameter
Maximum Rating
Units
DC Current, at any port
TBD
mA
dBm
°C
Power Handling, at any Port
Operating Temperature
Storage Temperature
TBD
-55 to +100
-65 to +125
°C
3.2 Package Information
Parameter
Details
Human Body Model (HBM), per MIL-STD-750, Method 1020
Rating
ESD
N/A
3.3 Electrical Specifications3
The electrical specifications apply at TA=+25°C in a 50Ω system.
3.3.1 Connectorized Package
Min and Max limits are guaranteed at TA=+25°C.
Frequency
Parameter
Coupling
Min
Typ.
Max
Units
(GHz)
3
90
dB
Nominal Phase Shift
Amplitude Balance
Phase Balance
Degrees
dB
±0.4
±3
±2
±10
Degrees
2.5-8.5
Excess Through Line
Insertion Loss
2
4
dB
dB
Isolation
VSWR
14
23
1.15
50
Impedance
Ω
3
Quadrature hybrid is reciprocal. Reverse measurement is equivalent to forward measurement.
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MQH-2R58R5
3.4 Typical Performance Plots4
4 All measurements taken from a connectorized unit in a 50Ω environment. On-chip load was not
used when taking measurements.
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MQH-2R58R5
4 Application Information
Quadrature signal generation is useful for many applications in analog signal processing. Marki
MQH/S MMIC quadrature hybrids and 90˚ Splitter/Combiners offer this functionality in a small
factor with high repeatability. Below are applications and how they can be realized with the MQH
and MQS product lines.
Quadrature Hybrids vs 90˚ Splitter/Combiners
Some products are ‘true’ quadrature hybrids, while others are 90˚ Splitter/Combiners. What is
the difference? A quadrature hybrid is symmetric about all four ports, meaning that in a splitting
application any port can be used as an input, with the isolated and output ports following from this
selection. Likewise, for a combining application, any port can be used as an output.
A 90˚ Splitter/Combiner is not symmetric. When splitting, only ports 1 and 2 can be used as an
input. If ports 3 or 4 were used, there would be significant phase walk-off between the output
ports. As a combiner, only ports 1 and 2 are suitable as output ports. The phase walk-off
introduced when using ports 3 or 4 as an output means that reflected signals recombine and
cancel poorly inside a 90° Splitter/Combiner.
Single Sideband and Image Reject Mixers
The primary application for the MQH and MQS series is as IF or LO quadrature signal
splitter/combiners. They can be used in combination with the MMIQ series of IQ mixers to create
broadband single sideband and image reject mixers. Either 90˚ Splitter/Combiners or quadrature
hybrids can be used as the IF hybrid, but if a 90˚ Splitter/Combiner is used only one sideband (or
image) is accessible, whereas if a quadrature hybrid is used than both sidebands are accessible.
If a 90˚ Splitter/Combiner is used for a single sideband upconverter or image reject mixer, port 1
(or 2) should be used as the IF input/output and ports 2 and 3 (or 1 and 4) should be connected to
the I and Q ports. Selecting port 1 or 2 to terminate will select which sideband of the mixer to
reject.
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MQH-2R58R5
Balanced Amplifiers
In a balanced amplifier, the poor return loss of an amplifier is compensated for with a quadrature
hybrid. In this application, the reflections from the input or output are collected at the isolated
port of the quadrature hybrid and terminated.
Since a 90˚ Splitter/Combiner is not completely symmetric, reflected signals will not terminate as
well as with a quadrature hybrid. An MQH option is recommended for this application. If a 90˚
Splitter/Combiner is used for a single sideband upconverter or image reject mixer, port 1 (or 2)
should be used as the IF input/output and ports 2 and 3 (or 1 and 4) should be connected to the I
and Q ports. Selecting port 1 or 2 to terminate will select which sideband of the mixer to reject.
Testing/simulation is recommended when considering if a 90° Splitter/Combiner is suitable.
Reflectionless Filter
Similar to a balanced amplifier, a reflectionless filter will terminate reflections that are out of band
for a filter (but in band for the quadrature hybrid) at the isolated port.
Since a 90˚ Splitter/Combiner is not completely symmetric, reflected signals will not terminate as
well as with a quadrature hybrid. An MQH option is recommended for this application. If a 90˚
Splitter/Combiner is used for a single sideband upconverter or image reject mixer, port 1 (or 2)
should be used as the IF input/output and ports 2 and 3 (or 1 and 4) should be connected to the I
and Q ports. Selecting port 1 or 2 to terminate will select which sideband of the mixer to reject.
Testing/simulation is recommended when considering if a 90° Splitter/Combiner is suitable
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MQH-2R58R5
Reflective Applications
Unlike in the previous applications, reflective applications only work well with a quadrature hybrid
(not a 90˚ Splitter/Combiner). In these applications a signal is reflected off of two identical
structures (typically a PIN diode) and the output signal is collected at the isolated port. In this
case the desired signal is deliberately reflected.
Since a 90˚ Splitter/Combiner is not completely symmetric, you will have poor results if you use
one for reflective applications.
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MQH-2R58R5
5 Die Mounting Recommendations
5.1 Mounting and Bonding Recommendations
Marki MMICs should be attached directly to a ground plane with conductive epoxy. The
ground plane electrical impedance should be as low as practically possible. This will
prevent resonances and permit the best possible electrical performance. Datasheet
performance is only guaranteed in an environment with a low electrical impedance ground.
Mounting - To epoxy the chip, apply a minimum amount of conductive epoxy to the
mounting surface so that a thin epoxy fillet is observed around the perimeter of the chip.
Cure epoxy according to manufacturer instructions.
Wire Bonding - Ball or wedge bond with 0.025 mm (1 mil) diameter pure gold wire.
Thermosonic wirebonding with a nominal stage temperature of 150 °C and a ball bonding
force of 40 to 50 grams or wedge bonding force of 18 to 22 grams is recommended. Use
the minimum level of ultrasonic energy to achieve reliable wirebonds. Wirebonds should be
started on the chip and terminated on the package or substrate.
Circuit Considerations – 50 Ω transmission lines should be used for all high frequency
connections in and out of the chip. In circumstances where the chip more than .001”
thinner than the substrate, a heat spreading spacer tab is optional to further reduce
bondwire length and parasitic inductance.
Special Considerations for 90° Splitters – Transitions between the chip and
transmission line should be as close to 50 Ω as possible. Small impedance mismatches will
result in poor phase balance mid-band due to reflections. Length and number of wire
bonds should be adjusted to tune inductance for an optimal 50 Ω match. In the modules,
chip transitions are optimized for broadband performance.
5.2 Handling Precautions
General Handling
Chips should be handled with care using tweezers or a vacuum collet. Users should take
precautions to protect chips from direct human contact that can deposit contaminants,
like perspiration and skin oils on any of the chip's surfaces.
Cleaning and Storage: Do not attempt to clean the chip with a liquid cleaning system or
expose the bare chips to liquid. Once the ESD sensitive bags the chips are stored in are
opened, chips should be stored in a dry nitrogen atmosphere.
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MQH-2R58R5
5.3 Bonding Diagram
The MQH-2R58R5 has 50Ω loads near each I/O port, allowing the user to terminate the isolated
port on-chip.
5.3.1 Four Port Device
5.3.2 Isolated Port Terminated
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MQH-2R58R5
6 Mechanical Data
6.1 CH Outline Drawing
1. CH Substrate material is 0.004 in thick GaAs.
2. I/O trace finish is 5 microns Au. Ground plane finish is 4 microns Au.
6.2 UB Package Outline Drawing
Marki Microwave reserves the right to make changes to the product(s) or information contained herein without notice.
Marki Microwave makes no warranty, representation, or guarantee regarding the suitability of its products for any
particular purpose, nor does Marki Microwave assume any liability whatsoever arising out of the use or application of any
product.
© Marki Microwave, Inc.
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