the use of double tuned matching networks to increase the bandwidth of a frequency dependant load, such as an antenna, is a useful technique. Double tuned matching networks have been presented in [1]–[3]. Their application to antennas has also been shown. For example, a disk-loaded monopole antenna using a double-tuned matching network is described in [4]. Double-tuned matching has also been applied to patch antennas in the form of stacked patches [5]. In the design of com- pact antennas such techniques can be useful provided that the matching network can be made to fit into a compact area.
In this paper we present a compact planar antenna with an embedded double-tuned matching network. A metamaterial unit cell is used for the matching network to fit the entire antenna into a compact area. The antenna is designed with an application for laptop computers in mind. Hence its geometry is such that the entire antenna, including the ground plane, fits onto the frame of a laptop monitor. In Section II, the concept of double-tuned matching is reviewed. Section III describes the antenna to be matched. Sections IV and V describe the design of the matching network as well as a the circuit model for the matching network. Finally Section VI describes a fabricated prototype of the antenna and its experimental results.