A Low Profile Wideband Magneto-Electric Dipole Antenna with Gain Enhancement

A low profile wideband magneto-electric dipole (MED) antenna embedded with rectangular slot is proposed in this communication. Further FR4 substrate is added to enhance the overall gain of the antenna. Proposed antenna divides in two parts, first part is electric dipole that is nothing but a metallic element of ‘+’ sign shape, placed horizontally integrated with rectangular slots and second part is magnetic dipole, that is constructed by reduced width vertical rectangular walls shorted with ground. Low profile of the antenna is maintained by reducing the width of vertical patches with keeping height equivalent to antenna height without compromising the bandwidth. The width of vertical walls has been reduced up to 50% as compared to conventional MED antennas stated in literature. To stabilize the gain size and shape of the ground is kept same as the electric dipole. The designed antenna has shown the impedance bandwidth of 91% for the frequency band of 1.05GHz - 2.55GHz and nearly constant gain of 9±1dBiin desired frequency band. The radiation patterns of the antenna in E-plane and H-plane are symmetrical and closely unidirectional, hence it also satisfied the basic characteristic of MED antenna. Furthermore, the antenna is dc grounded which can fulfil the conditions of various applications and it has shown good radiation efficiency. All experimental results are matched well with the simulated results. Proposed antenna can be used in RADAR systems, Aircraft surveillance, global positioning systems (GPS), satellite TV and some applications of S band as well.