Improving the Performance of Edge-Fed Monopole Antenna Using Artificial Magnetic Conductors

A wideband edge-fed monopole antenna with artificial magnetic conductor (AMC) as ground plane is proposed. AMC ground plane instead of conventional PEC plane is used to improve the antenna gain and bandwidth. The proposed AMC structure which uses a 1 mm air gap results in increasing the bandwidth to about 18.25% with nearly 4% improvement compared to the AMC structure without air gap.Using air gap and reducing AMC substrate height is a suitable method for decreasing weight, especially in lower frequencies. In the case of using air gap a 1-mm-thick AMC substrate can be used that improves bandwidth to 23.91% at the expense of only 1dB reduction of the gain which is a desired result.

Keywords:

artificial magnetic conductor (AMC) , monopole antenna , edge-fed antenna , unit cell , air gap