MULTI-LAYERED DUAL-BAND MICROSTRIP ANTENNA

 

Geometry of the problem

 

Top view

 

Front view

 

 

Side view

 

Description

One high permittivity dielectric substrate is sandwiched by two less dense substrates, with the following characteristics:

The antenna consists of three horizontal patches.

One patch with dimensions 25 mm x 40 mm is on the top of the third substrate. Two smaller patches with dimensions 25 mm x 10 mm are on the top of the intermediate substrate. The feeding probe is 6.5 mm away from the edges of the smaller metallisations.

 

References

[1] C.S. Lee, V. Nalbandian, and F. Schwering, “Planar Dual-Band Microstrip Antenna,” IEEE Transactions on Antennas and Propagat., vol. AP-43, n. 8, 1995, pp. 892-895.

[2] 3DAM v2.2.00 (3D-Antenna Modeller), http://www.ids-spa.it/.

 

Results

S11 parameter versus frequency scan: [3.2, 4.2] GHz

 

     

Measured [1] # Frequency |S11| dB 3.214635e+00 -9.759036e-01 3.232665e+00 -9.759036e-01 3.254837e+00 -1.168675e+00 3.281189e+00 -1.168675e+00 3.307531e+00 -1.265060e+00 3.343592e+00 -1.265060e+00 3.376869e+00 -1.361446e+00 3.408740e+00 -1.650602e+00 3.436409e+00 -2.325301e+00 3.462681e+00 -3.096386e+00 3.484762e+00 -4.156627e+00 3.499868e+00 -5.602410e+00 3.514954e+00 -7.240964e+00 3.530030e+00 -8.975904e+00 3.539508e+00 -1.119277e+01 3.544856e+00 -1.312048e+01 3.551580e+00 -1.514458e+01 3.554133e+00 -1.726506e+01 3.555380e+00 -1.861446e+01 3.562144e+00 -2.025301e+01 3.561934e+00 -2.227711e+01 3.567331e+00 -2.372289e+01 3.571342e+00 -2.516867e+01 3.575763e+00 -2.266265e+01 3.580155e+00 -2.044578e+01 3.581782e+00 -1.813253e+01 3.583370e+00 -1.620482e+01 3.590585e+00 -1.350602e+01 3.597711e+00 -1.167470e+01 3.607670e+00 -9.265060e+00 3.620353e+00 -7.337349e+00 3.635790e+00 -5.602410e+00 3.653921e+00 -4.638554e+00 3.677620e+00 -3.481928e+00 3.697087e+00 -3.000000e+00 3.729018e+00 -2.710843e+00 3.752596e+00 -2.710843e+00 3.777551e+00 -2.807229e+00 3.806637e+00 -3.192771e+00 3.825985e+00 -3.867470e+00 3.853563e+00 -5.409639e+00 3.868680e+00 -6.759036e+00 3.876881e+00 -7.915663e+00 3.891947e+00 -9.746988e+00 3.897345e+00 -1.119277e+01 3.905436e+00 -1.340964e+01 3.907969e+00 -1.572289e+01 3.914693e+00 -1.774699e+01 3.917267e+00 -1.967470e+01 3.921307e+00 -2.083133e+01 3.925298e+00 -2.246988e+01 3.930665e+00 -2.420482e+01 3.937881e+00 -2.150602e+01 3.942232e+00 -1.967470e+01 3.943850e+00 -1.745783e+01 3.945467e+00 -1.524096e+01 3.955457e+00 -1.254217e+01 3.964029e+00 -1.013253e+01 3.978089e+00 -8.301205e+00 3.989376e+00 -6.469880e+00 4.010360e+00 -4.734940e+00 4.029868e+00 -3.867470e+00 4.049346e+00 -3.289157e+00 4.067446e+00 -2.614458e+00 4.089688e+00 -2.132530e+00 4.113306e+00 -1.746988e+00 4.143860e+00 -1.361446e+00 4.167448e+00 -1.265060e+00 4.192424e+00 -1.168675e+00

Simulated [1] # Frequency |S11| dB 3.202152e+00 -9.759036e-01 3.245138e+00 -1.072289e+00 3.288114e+00 -1.265060e+00 3.326919e+00 -1.554217e+00 3.365684e+00 -2.228916e+00 3.401674e+00 -2.903614e+00 3.432087e+00 -3.867470e+00 3.451374e+00 -5.120482e+00 3.473355e+00 -7.144578e+00 3.492482e+00 -9.939759e+00 3.508765e+00 -1.340964e+01 3.518132e+00 -1.668675e+01 3.531631e+00 -2.025301e+01 3.544465e+00 -1.687952e+01 3.554574e+00 -1.302410e+01 3.565991e+00 -9.939759e+00 3.585689e+00 -7.240964e+00 3.601096e+00 -5.795181e+00 3.623458e+00 -4.156627e+00 3.661076e+00 -2.518072e+00 3.700002e+00 -1.650602e+00 3.744455e+00 -9.759036e-01 3.795802e+00 -6.867470e-01 3.829069e+00 -8.795181e-01 3.849784e+00 -1.746988e+00 3.862076e+00 -3.578313e+00 3.872931e+00 -5.891566e+00 3.880821e+00 -1.003614e+01 3.888622e+00 -1.504819e+01 3.892632e+00 -1.649398e+01 3.901285e+00 -1.331325e+01 3.909958e+00 -9.939759e+00 3.918570e+00 -7.144578e+00 3.931263e+00 -5.120482e+00 3.953635e+00 -3.385542e+00 3.985646e+00 -2.325301e+00 4.027305e+00 -1.843373e+00 4.061999e+00 -1.650602e+00 4.093919e+00 -1.457831e+00 4.135548e+00 -1.265060e+00 4.177157e+00 -1.265060e+00 4.203509e+00 -1.265060e+00

Simulated [2] # Frequency |S11| dB 3.201698e+00 -5.400655e-01 3.240747e+00 -6.376288e-01 3.274703e+00 -8.286106e-01 3.298472e+00 -1.018636e+00 3.329032e+00 -1.397092e+00 3.368081e+00 -1.776346e+00 3.405433e+00 -2.812717e+00 3.432598e+00 -4.129821e+00 3.447878e+00 -5.070223e+00 3.469949e+00 -7.231920e+00 3.488625e+00 -9.768885e+00 3.498812e+00 -1.258674e+01 3.510696e+00 -1.756438e+01 3.520883e+00 -2.329304e+01 3.525976e+00 -2.864563e+01 3.532767e+00 -2.282467e+01 3.537861e+00 -1.756694e+01 3.549745e+00 -1.287322e+01 3.565025e+00 -8.930988e+00 3.590492e+00 -5.271408e+00 3.638031e+00 -2.552867e+00 3.699151e+00 -1.056258e+00 3.753480e+00 -4.979794e-01 3.807810e+00 -3.152873e-01 3.834975e+00 -5.056314e-01 3.851952e+00 -1.258399e+00 3.867233e+00 -3.231665e+00 3.879117e+00 -5.674096e+00 3.884211e+00 -8.397578e+00 3.889304e+00 -1.159054e+01 3.901188e+00 -1.553532e+01 3.907980e+00 -1.356413e+01 3.913073e+00 -9.996533e+00 3.921562e+00 -7.086532e+00 3.938540e+00 -4.365121e+00 3.972496e+00 -2.396478e+00 4.008149e+00 -1.554756e+00 4.048896e+00 -1.182995e+00 4.098132e+00 -9.998246e-01 4.145671e+00 -9.103916e-01 4.194907e+00 -9.150147e-01

 

Structural currents:

(evaluated by using 3DAM v2.2.00 3D-Antenna Modeller  IDS)

 

3525 MHz

 

3900 MHz