AN/SPY Series Radars

References:
Naval Institute Press Guide to World Naval Weapons Systems (97-98) by Norman Friedman
Total Ownership Cost Reduction Case Study: AEGIS Radar Phase Shifters by Wray W. Bridger and Mark D. Ruiz (790 kb PDF)
Naval Engineer's Journal Volume 121 Issue 3

AN/SPY-1 (Engineering Development Model 1 / EDM-1)

IEEE Band: S Band
NATO Band:
F Band (3100-3500 MHz)
Array Cost: $8.6 million~ (FY74)

Notes: Originally Advanced Surface Missile System (ASMS). Renamed AEGIS in December 1969. Additionally, in late 1969, the contract for SPY-1 was awarded to RCA. In 1974, the USS Norton Sound was fitted with SPY-1. Generation I Ferrite Phase Shifters were used, at a cost of $2000 (FY74) per shifter.

(Photograph of EDM-1 at RCA's LBTS)

AN/SPY-1A (also Engineering Development Model 3C / EDM-3C)

IEEE Band: S Band
NATO Band:
F Band (3100-3500 MHz)
T/R Count: 4,096 Transmitters and 4,352 receivers grouped into 128 array modules; each with 32 elements each.
Antenna Diameter: 3.7 meters (12 feet)
Array Cost: $860,000~ (FY84)

Notes: Twelve units built and installed (CG 47-58) Generation II Ferrite Phase Shifters were used, at a cost of $200 (FY84) per shifter and they were 50% shorter than Generation I phase shifters allowing total AEGIS weight to be reduced by about 20 tons.

AN/SPY-1B

IEEE Band: S Band
NATO Band:
F Band (3100-3500 MHz)
T/R Count: 4,350 Transmitters
Antenna Diameter: 3.7 meters (12 feet)

Notes: Twenty-seven units built and installed (CG 59-73). Development work began January 1980 with the first target track occuring in November 1984. IOC was achieved in 1989 when USS Princeton (CG-59) was commissioned. Introduced new smaller phase shifters; allowing much lighter weights. Also, some key anti-stealth features were implemented, although a full implementation had to wait for SPY-1D(V).

(Image of SPY-1A vs SPY-1B Phase Shifter)

AN/SPY-1C

Notes: Designation not used.

AN/SPY-1D

IEEE Band: S Band
NATO Band:
F Band (3100-3500 MHz)
T/R Count: 4,350 Transmitters
Antenna Diameter: 3.7 meters (12 feet)

Notes: Forty-one units built and installed (DDG-51-91). By FY02, Garnet Phase Shifters cost only $100. By FY06; the cost was $80~.

AN/SPY-1D(V)

Notes: Twenty-one units built and installed (DDG-92 to DDG-112). Full implementation of anti-stealth features. Introduced advanced waveforms which reduced background clutter, allowing much better detection of stealthy targets. New ECCM processing techniques were introduced to defeat several types of deceptive jamming. Performance against targets with land backgrounds was also greatly improved. Became operational in 2004 when USS Pinckney (DDG-91) was commissioned.

AN/SPY-1E

Notes: Upgrades of earlier radars to enhance effectiveness against ballistic missiles.

AN/SPY-1F

IEEE Band: S Band
NATO Band:
F Band (3100-3500 MHz)
T/R Count: 1,856 elements
Antenna Diameter: 2.4 meters (8 feet)

Notes: Designed for use on Frigates, Destroyers, Amphibious Warfare ships, and Carriers.

AN/SPY-1K

IEEE Band: S Band
NATO Band:
F Band (3100-3500 MHz)
T/R Count: 912 elements
Antenna Diameter: 1.7 meters (5.5 feet)

Notes: Designed for use on Frigates and Corvettes.

AN/SPY-2 Volume Search Radar

IEEE Band: S Band

AN/SPY-3

IEEE Band: S and X Bands

Notes: First shipboard AESA radar. Will be installed in DDG-1000 to DDG-1001. Can switch from S to X band depending on which function is the most needed – from rapid volume search (S Band), to precise fire control tracking (X Band).

AN/SPY-5

IEEE Band: X Band

Notes: Uses Mk 73 Solid-State Transmitters. Name is by Raytheon. Not known if this is a formal designation or a marketing one.