Broadband counterwound spiral antenna for subsurface radar applications
Lim, Teck Yong
Knorr, Jeffrey B.
MetadataShow full item record
Subsurface radar, also known as ground-penetrating radar, is increasingly being used for the detection and location of buried objects such as mines and structures that are found within the upper regions of the earth's surface. The thesis gives a review of the work done to date in this area, laying emphasis on the possible antenna designs to match the range of intended applications. An overall design strategy is outlined, together with a more detailed treatment of the ground-penetrating radar subsystems and topics which are relevant to effective subsurface radar operation. These include the dielectric properties of earth materials, the choice of frequency of operation, as well as the design and construction of suitable antennas. Finally, a new antenna structure called the counter-wound spiral antenna, which is suitable for subsurface radar applications, is examined. The counter-wound spiral antenna has a broad bandwidth and a linear polarization with a controllable plane of polarization from a planar geometry. It has an electronically steerable plane of polarization. This unique property offers a reduction in antenna polarization loss and allows the extraction of maximum information from the target scattered echo.
Approved for public release, distribution is unlimited
Showing items related by title, author, creator and subject.
Shivandas, Dilipkumar (Monterey California. Naval Postgraduate School, 2004-03);Ground penetrating radars (GPRs), also known as subsurface radars, are used in many applications including detection of land mines and unexploded ordnance (UXO). Despite significant long-term investment in GPRs for mine ...
Gala, Antonio (Monterey, California. Naval Postgraduate School, 1991-09);Project Evergreen was an experiment conducted to evaluate antenna responses to nanosecond pulses and the capability of broadband equipment to capture them. The two antennas tested were a log periodic antenna modified by ...
Ong, Chee Hwee (Monterey, California. Naval Postgraduate School, 2003-12);This thesis project modeled a microstrip ring-hybrid dipole that is capable of simultaneously producing a sum pattern and difference pattern using the method of moments (MoM) based on the Rao-Wilton-Glisson (RWG) edge ...