Passive sensor & L-band radar of USA ?

Russia: PAK FA and MiG-31 have L-band radar as NIIP (Tikhomirov AESA) & Zaslon-AM
Israel has EL/M-2080 L-band radar
Ukraine has Kolchuga passive sensor

L-band radar can detect stealth aircraft such as F-22 or F-35, L-band radar can be switched on constantly and not easily detectable (similar AESA radar, but L-band radar does not change the frequency as AESA), because when installed onboard the aircraft’s nose, made from materials compousite not reflect radar waves from radar such as the APG-77 X-band (3cm) used track MiG-31 or T-50 (note: head-on), in addition to the sensor surface as Kolchuga or AESA radar EL/M-2080 ground-base can effectively resist attacks from the EA-18G (electronic warfare) or ARM missiles like the AGM-88 HARM.

AESA radar can change frequencies continuously & AGM-88 will be elusive, with passive sensor AGM-88 can’t be detected because it is receiving signals from the noise of the engine as well as radar (The stealth aircraft while operating the equipment required to open as radio contact with the command center, equipment altimetry, radar to find targets. passive sensor receive these signals to detect targets), so it does not emit as radar frequency to & AGM-88 can’t find (Except for the use of guided bombs as the JDAM, TLAM, used Targeting pod).

Finally What the USA got ?