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LZY-2
AN-60-005 Rev.:A M63968 (02/12/99) File: AN60005
This document and its contents are the properties of Mini-Circuits.
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AN-60-005
APPLICATION NOTE
LZY-2
ULTRA LINEAR RF AMPLIFIER
500 MHz - 1000 MHz
20 WATTS MIN., 1 dB COMPRESSION
(40 dB MIN. GAIN)
Reviewed by:
Jack Semizian
Radha Setty
INTERNET http://www.minicircuits.com
P.O. Box 350166, Brooklyn, New York 11235-0003 (718) 934-4500 Fax (718) 332-4661
Distribution Centers/NORTH AMERICA 800-654-7949 417-335-5935 Fax 417-335-5945 EUROPE 44-1252-835094 Fax 44-1252-837010 AN-60-005 Rev.:A M63968 (02/12/99) File: AN60005
This document and its contents are the properties of Mini-Circuits.
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TABLE OF CONTENTS
1.0
General Description ........................................................................................................................4
2.0
Electrical Performance Specifications .............................................................................................4
3.0
Mechanical Specifications .............................................................................................................10
4.0
Electrical Featuress ........................................................................................................................10
4.1
Overdrive Protection..........................................................................................................10
4.2
Thermal Overload Protection.............................................................................................10
4.3
Reverse Polarity Protection................................................................................................11
4.4
Transient Protection ...........................................................................................................11
4.5
Shut-off Terminal...............................................................................................................11
4.6
General Caution .................................................................................................................11
5.0
Mechanical Features ......................................................................................................................12
5.1
Mechanical Outline............................................................................................................12
5.2
Heat Sink............................................................................................................................12
5.3
Cooling Fan........................................................................................................................12
5.4
Weight................................................................................................................................12
6.0
Suggested Applications (General) .................................................................................................12
6.1
AM Amplification..............................................................................................................12
6.2
FM Amplification ..............................................................................................................13
6.3
Linear Pulse Amplification ...............................................................................................13
6.4
Broadband 500 MHz - 1000 MHz Swept Signal ...............................................................13
6.5
Feedforward Amplification................................................................................................13
7.0
Multi-Carrier Amplification (Cellular Band - 869 MHz to 894 MHz)..........................................13
8.0
Alternative Heat Sinking / Cooling................................................................................................16
9.0
Quality Assurance Provisions ........................................................................................................16
9.1
Acceptance Test Procedure...............................................................................................16
9.1.1 Acceptance Test Procedure Test Setup..................................................................17
9.1.2 Test Equipment List...............................................................................................17
9.2
Warranty ...........................................................................................................................18 AN-60-005 Rev.:A M63968 (02/12/99) File: AN60005
This document and its contents are the properties of Mini-Circuits.
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LIST OF ILLUSTRATIONS
Figure 1:
Small Signal Response @ -22 dBm P
in
...............................................................................6
Figure 2:
Large Signal Response @ -4 dBm P
in
.................................................................................6
Figure 3:
Two Tone Performance at 950 MHz ..................................................................................7
Figure 4:
Acceptance Test Procedure Test Setup................................................................................8
Figure 5:
Mechanical Outline Drawing ..............................................................................................9
Figure 6:
8 Tone - 2 Watts Average (Total) Random Phase .............................................................14
Figure 7:
8 Tone - 2 Watts Average (Total) Synchronous ................................................................14
Figure 8:
2 Tone -10 Watts Average (Total) Random Phase ............................................................15
LIST OF TABLES
Table 1:
Electrical Performance Specifications .................................................................................5
Table 2:
Acceptance Test Setup Equipment ....................................................................................17 AN-60-005 Rev.:A M63968 (02/12/99) File: AN60005
This document and its contents are the properties of Mini-Circuits.
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LZY-2
1.0
GENERAL DESCRIPTION
The LZY-2 is a low cost, rugged, versatile, 40 dB Gain (minimum), Broadband, Class a Linear
RF Power Amplifier Module designed to operate linearly over the 500 MHz to 1000 MHz
frequency bands. The LZY-2 features low compression and low harmonic distortion at 20 watts,
which make it ideally suited to a wide variety of AM, FM, Pulse and Multi-Carrier applications
including cellular service in FEEDFORWARD amplifiers as a Pre Amplifier, Main Amplifier or
Error Amplifier.
The conservative electrical and thermal design and careful attention to semiconductor ratings
insures continued years of service in both the laboratory and many Commercial and Military
environments.
The workmanship, quality and attention to protective features along with selection of
components to COTS (commercial off-the-shelf) guidelines, further enhance applicability and
long MTTF which results in low cost-of-ownership.
The unit electrical performance is specified at +28 VDC but the unit will operate without damage
over the +24 VDC to +30 VDC range.
The LZY-2 is supplied with its own high thermal efficiency heat sink and 4 inch ball bearing
cooling fan for immediate use and reliable operation.
For applications where the heat sink / fan assembly presents a difficult physical fit, the RF linear
amplifier module may be removed and operated safely with alternative heat sink / cooling
methods if the guidelines in paragraph 8.0 are followed. Operation of the amplifier module
without proper heat sinking is not recommended and violates the warranty.
Protective features such as Input Overdrive, Reverse Polarity, Transient Protection and Thermal
Overload with automatic reset are included. A separate shut-off terminal is provided for remote
amplifier on/off control.
The LZY-2 was designed to satisfy a range of broad and narrow band multitone or single
frequency applications for original equipment, production test and laboratory equipment uses.
2.0
ELECTRICAL PERFORMANCE SPECIFICATIONS
The Electrical Performance Specifications and limits are listed in Table 1.
Typical broadband small and large signal gain and return loss responses are shown in Figures 1
and 2 respectively.
Comparison of the curves and gain data at the measurement points illustrates the dynamic
linearity of the LZY-2 across the frequency band.
Figure 3 illustrates two tone performance with two 2 Watt tones separated by 1 MHz at 950
MHz. IP
3
under these conditions is +53 dBm. AN-60-005 Rev.:A M63968 (02/12/99) File: AN60005
This document and its contents are the properties of Mini-Circuits.
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This document and its contents are the properties of Mini-Circuits.
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Figure 1: Small Signal Response @-22 dBm P
IN
Figure 2: Large Signal Response @ -4 dBm P
IN AN-60-005 Rev.:A M63968 (02/12/99) File: AN60005
This document and its contents are the properties of Mini-Circuits.
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Figure 3: Two Tone Performance