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AN/APG-68
The AN/APG-68 radar is a long range (up to
296
km)[1] Pulse-doppler radar designed by Westinghouse
(now Northrop Grumman) to replace AN/APG-66 radar
in the F-16 Fighting Falcon. The AN/APG-68(V)8
and earlier radar system consists of the following
line-
replaceable units:
• Antenna
• Dual Mode Transmitter (DMT)
• Modular Low-power radio frequency (MLPRF)
• Programmable signal processor (PSP)
The AN/APG-68(V)9[2] radar system consists of the fol-
lowing line-replaceable units:
• Antenna
• Medium Duty Transmitter (MDT)
• Modular Receiver/Exciter (MoRE)
•
Common Radar Processor (CoRP)
The AN/APG-68(V)9 radar is the latest development.
Besides the increase in scan range compared to the pre-
vious version, it has a Synthetic aperture radar (SAR)
ca-
pability.
The APG-68(V)9 has equipped several variants, includ-
ing the F-16D Block 52+s of the Israeli Air Force,
Republic of Singapore Air Force, Turkish Air Force,[3]
Moroccan Air Force and Greek Air Force, Pakistan
Air
Force,F-16C/D Block 52+s of the Polish Air
Force and
F-16 A/B Block 15 MLU of the Royal Thai Air Force
1 Specifications
• Frequency: Starting Envelope frequency around
9.86 GHz.
• Under AIS Testing as high as 26 GHz
• Range: 296.32 km, 184 miles
• Range for 5m2 aerial target is 105km[4]
• Search cone: 120 degrees × 120 degrees
• Azimuth angular coverage: ±10 degrees / ± 30 de-
grees / ± 60 degrees
• Programmable Signal Processor (PSP) - The core
radar component which is responsible for signal pro-
cessing, frequency selection, signal digitization for
B-Scope display. The PSP is controlled through
the F-16 Heads Down Display Set (HDDS) or
what is commonly called the Multi-Function Dis-
plays (MFDs). The PSP is directed by the sys-
tem operational flight program (OFP), which is
con-
trolled and modified for new threats or addition
radar system requirements. The PSP also contains
all the controls circuitry for
radar A/A and A/G op-erational scan patterns
and SAR/ISAR operation.
• Modular Low Powered Radio Frequency (MLPRF)
- The frequency generator for the radar system.
Fre-
quency generation is dependent on the random fre-
quency selection from the radar tables within the
PSP upon system start-up. The MLPRF will gener-
ate a small amount of RF Drive, which is sent to the
Dual Mode Transmitter (DMT), where it is ampli-
fied and a small RF sampleis sent to the MLPRF for
comparison checksum (more like a check and bal-
ance system). The MLPRF also is responsible forthe receiving of
the radar return, generating the RF
injection noise (for RF discrimination), and the pro-
cessed RF within the MLPRF is then later sent to the
PSP for video processing and threat/target matching
against the radar threat tables within the PSP, prior
to flightcrew system display.
• Dual Mode Transmitter (DMT) - A 24,000 volt
radar transmitter, containing a TWT, which gener-
ates the amplified RF to be sent to the radar Antenna
for system emission. The TWT operates by opti-cal pulses
received from the DMT’s internal Pulse
Decker Unit and TWT Cathode/Anode voltage in-
puts.
• Antenna - A planar array antenna, which
is con-
structed to receive RF data through a waveguide
system. The transmitted and received pulses are
controlled in time by the PMW (Pulse Modulated
Wave) radar design, and the waveguide duplexer
assembly. Internal to the antenna are Uniphaser
Assemblies (used for quadrature phase control),
Phase Shifters (used of quadrature I/Q data) andgimbalized
motor control for antenna positioning
and position correction.
1
https://en.wikipedia.org/wiki/Gimbalhttps://en.wikipedia.org/wiki/Duplexerhttps://en.wikipedia.org/wiki/Waveguide_(electromagnetism)https://en.wikipedia.org/wiki/Planar_arrayhttps://en.wikipedia.org/wiki/Travelling_wave_tubehttps://en.wikipedia.org/wiki/Signal_generatorhttps://en.wikipedia.org/wiki/Air-to-ground_weaponryhttps://en.wikipedia.org/wiki/Air-to-air_missilehttps://en.wikipedia.org/wiki/Operational_flight_programhttps://en.wikipedia.org/wiki/Multi-Function_Displayhttps://en.wikipedia.org/wiki/Multi-Function_Displayhttps://en.wikipedia.org/wiki/Royal_Thai_Air_Forcehttps://en.wikipedia.org/wiki/Polish_Air_Forcehttps://en.wikipedia.org/wiki/Pakistan_Air_Forcehttps://en.wikipedia.org/wiki/Pakistan_Air_Forcehttps://en.wikipedia.org/wiki/Greek_Air_Forcehttps://en.wikipedia.org/wiki/Moroccan_Air_Forcehttps://en.wikipedia.org/wiki/Turkish_Air_Forcehttps://en.wikipedia.org/wiki/Republic_of_Singapore_Air_Forcehttps://en.wikipedia.org/wiki/Israeli_Air_Forcehttps://en.wikipedia.org/wiki/Synthetic_aperture_radarhttps://en.wikipedia.org/wiki/Antenna_(radio)https://en.wikipedia.org/wiki/Line-replaceable_unithttps://en.wikipedia.org/wiki/Signal_processorhttps://en.wikipedia.org/wiki/Transmitterhttps://en.wikipedia.org/wiki/Antenna_(radio)https://en.wikipedia.org/wiki/Line-replaceable_unithttps://en.wikipedia.org/wiki/Line-replaceable_unithttps://en.wikipedia.org/wiki/F-16_Fighting_Falconhttps://en.wikipedia.org/wiki/Radarhttps://en.wikipedia.org/wiki/AN/APG-66https://en.wikipedia.org/wiki/Northrop_Grummanhttps://en.wikipedia.org/wiki/Pulse-dopplerhttps://en.wikipedia.org/wiki/Radar
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4 Text and image sources, contributors, and licenses
4.1 Text
• AN/APG-68 Source:
https://en.wikipedia.org/wiki/AN/APG-68?oldid=646082919 Contributors: Michael
Devore, XLerate, Arado, En-
gineer Bob, Ms2ger, Kevin, SmackBot, Colputt, Dual Freq,
TheGerm, A.R., A5b, MonsieurET, Amalas, Cydebot, NDCompuGeek,
Thijs!bot, Oldwildbill, WillMak050389, Sebras, BilCat, Ndunruh,
Lorddragyn, A. Carty, Kumioko (renamed), Addbot, Luckas-bot,
Yobot,
Xqbot, Slwiki2008, FrescoBot, EmausBot, BG19bot, YFdyh-bot,
Aladdin Ali Baba and Anonymous: 20
4.2 Images
•
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Source: https:
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Museum_-_DSC00415.JPG License: CC0
Contributors: Own work Original
artist: Daderot
•
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artist: ?
• File:Question_book-new.svg Source:
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License: Cc-by-sa-3.0
Contributors:
Created from scratch in Adobe Illustrator. Based
on Image:Question book.png created
by User:Equazcion Original artist:
Tkgd2007
• File:Seal_of_the_US_Air_Force.svg Source:
https://upload.wikimedia.org/wikipedia/commons/2/23/Seal_of_the_US_Air_Force.svg
License: Public
domain Contributors: SVG created from this
image Original artist: Arthur E. DuBois, according
to [1]
4.3 Content license
• Creative Commons Attribution-Share Alike 3.0
https://creativecommons.org/licenses/by-sa/3.0/http://usmilitary.about.com/od/airforce/l/blafseal.htmhttp://sojo.net/blogs/2012/02/12/lawmakers-angry-over-loss-god-air-force-logohttps://upload.wikimedia.org/wikipedia/commons/2/23/Seal_of_the_US_Air_Force.svghttp://localhost/var/www/apps/conversion/tmp/scratch_2//en.wikipedia.org/wiki/User:Tkgd2007http://localhost/var/www/apps/conversion/tmp/scratch_2//en.wikipedia.org/wiki/User:Equazcionhttp://localhost/var/www/apps/conversion/tmp/scratch_2//en.wikipedia.org/wiki/File:Question_book.pnghttps://upload.wikimedia.org/wikipedia/en/9/99/Question_book-new.svghttps://upload.wikimedia.org/wikipedia/en/4/4a/Commons-logo.svghttp://localhost/var/www/apps/conversion/tmp/scratch_2//commons.wikimedia.org/wiki/User:Daderothttps://upload.wikimedia.org/wikipedia/commons/d/d3/AN-APG-68_radar%252C_Westinghouse%252C_1978_-_National_Electronics_Museum_-_DSC00415.JPGhttps://upload.wikimedia.org/wikipedia/commons/d/d3/AN-APG-68_radar%252C_Westinghouse%252C_1978_-_National_Electronics_Museum_-_DSC00415.JPGhttps://upload.wikimedia.org/wikipedia/commons/d/d3/AN-APG-68_radar%252C_Westinghouse%252C_1978_-_National_Electronics_Museum_-_DSC00415.JPGhttps://en.wikipedia.org/wiki/AN/APG-68?oldid=646082919
