MEANDERED SLOT AND SLIT LOADED COMPACT MICROSTRIP ANTENNA WITH INTEGRATED IMPEDANCE TUNING NETWORK

In this paper, novel compact broadband dual frequency microstrip antennas are presented and broad-band impedance matching is proposed as a method for improve the matching level of antennas. The first proposed design consists of a rectangular microstrip antenna with a pair of parallel slots loaded close to the radiating edge of the patch and three meandering narrow slots embedded in the antenna surface. The second proposed design consists of a rectangular microstrip antenna with a meandering slits. With the first proposed design a size reduction of 34% and 45% for the two resonant frequencies is obtained respectively. The two frequencies have an operation frequency ratio of 1.30 and 1.25. The theoretical design implementation of compensated compact rectangular microstrip antennas with new configuration Pi-matching networks was presented. A new compensation network consisting of RC Mutator circuit and discrete capacitors are employed at the input of the microstrip antenna operating at 1.5 GHz and 2.5 GHz. The performance parameters of the designed microstrip antenna with and without compensation network were compared. The results show that compensation network can improve the return loss level and the resonant frequency can be controlled in a wide RF band.

[1]  Hala Elsadek,et al.  Quad Band Compact Size Trapezoidal Pifa Antenna , 2007 .

[2]  C. Aanandan,et al.  DESIGN OF COMPACT RECONFIGURABLE DUAL FREQUENCY MICROSTRIP ANTENNAS USING VARACTOR DIODES , 2006 .

[3]  Yong-Chang Jiao,et al.  COMPACT RING MONOPOLE ANTENNA WITH DOUBLE MEANDER LINES FOR 2.4/5 GHZ DUAL-BAND OPERATION , 2007 .

[4]  Kin-Lu Wong,et al.  A compact microstrip antenna with meandering slots in the ground plane , 2001 .

[5]  Kin-Lu Wong,et al.  Small circular microstrip antenna with dual-frequency operation , 1997 .

[6]  Filiberto Bilotti,et al.  DESIGN OF AN ACTIVE INTEGRATED ANTENNA FOR A PCMCIA CARD , 2006 .

[7]  Majeed A. S. Alkanhal,et al.  A NOVEL DUAL-BAND RECONFIGURABLE SQUARE-RING MICROSTRIP ANTENNA , 2007 .

[9]  P. Garcia,et al.  An RF electronically controlled impedance tuning network design and its application to an antenna input impedance automatic matching system , 2004, IEEE Transactions on Microwave Theory and Techniques.

[10]  Ya Jun Wang,et al.  COMPACT AND BROADBAND MICROSTRIP PATCH ANTENNA FOR THE 3G IMT-2000 HANDSETS APPLYING STYROFOAM AND SHORTING-POSTS , 2004 .

[11]  Adnan Kaya,et al.  Bandwidth enhancement of a microstrip antenna using negative inductance as impedance matching device , 2004 .

[12]  Kin-Lu Wong,et al.  COMPACT TRIANGULAR MICROSTRIP ANTENNA , 1997 .

[13]  Mark Thompson,et al.  Determination of the impedance matching domain of impedance matching networks , 2004, IEEE Transactions on Circuits and Systems I: Regular Papers.

[14]  G. Dadashzadeh,et al.  A Compact Microstrip Square-Ring Slot Antenna for UWB Applications , 2006, 2006 IEEE Antennas and Propagation Society International Symposium.

[15]  A. V. D. Capelle,et al.  An impedance-matching technique for increasing the bandwidth of microstrip antennas , 1989 .

[17]  Abdolali Abdipour,et al.  TIME DOMAIN ANALYSIS OF ACTIVE TRANSMISSION LINE USING FDTD TECHNIQUE (APPLICATION TO MICROWAVE/MM-WAVE TRANSISTORS) , 2007 .

[18]  A. Antoniou.  Novel RC-active-network synthesis using generalized- immittance converters , 1970 .