Accession Number : ADA572490


Title :   RF Metamaterials for Foliage Penetration (FOPEN) Application


Descriptive Note : Final rept. 1 Sep 2009-29 Mar 2012


Corporate Author : LOCKHEED MARTIN AERONAUTICS CO PALMDALE CA


Personal Author(s) : Poon, Nelson


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a572490.pdf


Report Date : Feb 2013


Pagination or Media Count : 75


Abstract : Foliage Penetration (FOPEN) radars are critical for detecting and identifying targets concealed by trees and forests. Typically, FOPEN transmits at high powers, making them difficult to design and operate at low frequencies where mismatches are possible. Low operating frequencies also result in large apertures that limit FOPEN systems to large platforms. Novel metamaterials have the potential to reduce the size of FOPEN antennas, but two persistent challenges remain. First, high transmit power requires a low-loss metamaterial solution. Second, the wide bandwidth required by FOPEN systems makes resonant metamaterials solutions unworkable. To shrink the volume of state-of-the-art FOPEN antennas and create a new capability for volume-limited aircraft, Lockheed Martin (LM) Corporation, in conjunction with the Ohio State University (OSU), proposes to develop a novel, metamaterial FOPEN antenna. Shadow Harvest, currently a USAF/ACC JCTD, is a sensor pod and roll-on/roll-off analyst module that adds ISR capability to any C-130 in the USAF fleet within 24 hours.


Descriptors :   *RADAR , *SURFACE TARGETS , *TARGET DETECTION , *TARGET RECOGNITION , ANTENNA ARRAYS , BEAM STEERING , BROADBAND , BURIED OBJECTS , FOLIAGE , HIGH POWER , LOW FREQUENCY , LOW LOSS , METAMATERIALS , PLATFORMS , RADIOFREQUENCY , ULTRAHIGH FREQUENCY


Subject Categories : Active & Passive Radar Detection & Equipment
      Target Direction, Range and Position Finding


Distribution Statement : APPROVED FOR PUBLIC RELEASE