• Journal of the Institute of Electronics Engineers of Korea TC
• /
• v.49 no.2
• /
• pp.56-66
• /
• 2012

The inductive loaded patch antenna with suppressed radiation along the horizontal plane and enhanced broadside gain is investigated by adjusting the width and the via radius of a unit cell at a fixed length of a unit cell. The effects of the via radius and the width of the unit cell on the dispersion characteristics of the inductive loaded transmission line are investigated. The systematic study to determine the via radius and the width of the unit cell for the effective dielectric constant of the inductive loaded patch antenna close to 1 in order to suppress the radiation along the horizontal plane is presented. Inductive loaded patch antennas composed of five unit cells with resonant frequency of 5 GHz are designed and their radiation characteristics are presented. The horizontal radiation along the E-plane is greatly suppressed to less than -15 dBi when the effective dielectric constant of the inductive loaded patch antenna is slightly less than 1.

• Journal of the Institute of Electronics and Information Engineers
• /
• v.50 no.7
• /
• pp.59-67
• /
• 2013

The radiation characteristics of an E-plane linear array antenna composed of inductive loaded patch antennas (ILPAs) are investigated. The radiation characteristics of an ILP array antenna are significantly improved compared to those of a conventional array antenna because the mutual coupling of an ILP array antenna is very small. The patch length of a $5{\times}2$ ILPA for the enhancement of the radiation characteristics of a 5-element E-plane linear array antenna composed of ILPAs is presented.

• Journal of the Institute of Electronics Engineers of Korea TC
• /
• v.49 no.6
• /
• pp.48-56
• /
• 2012

Radiation characteristics of inductive loaded patch antennas (ILPAs) and conventional patch antennas using a half wavelength resonance mode for substrates with various dielectric constants are investigated. ILPAs have the good radiation characteristics such as high broadside gain and suppressed radiation along the horizontal plane compared to those of conventional patch antennas. We show that ILPAs with the appropriate patch length and via radius have the optimum radiation characteristics such as the highest broadside gain and the most suppressed horizontal radiation.

• Journal of the Institute of Electronics and Information Engineers
• /
• v.49 no.9
• /
• pp.35-42
• /
• 2012

An inductive loaded microstrip patch antenna using aperture coupled feeding is designed and an impedance bandwidth enhancement method using a shunt stub is investigated. The -10 dB impedance bandwidth of the AIMPA with a shunt stub is increased up to about 5.51 %. The impedance bandwidth of the corresponding AIMPA without a shunt stub is 2.4 %. The increase of the impedance bandwidth of the AIMPA with a shunt stub is about 129.6 % compared to that of the corresponding AIMPA without a shunt stub.