Mutual impedance computation between printed dipoles

Mutual coupling between broadside printed dipoles embedded in stratified anisotropic dielectrics

“…The mutual coupling between the printed dipoles was computed and is shown in Figure 2 for various values of [EI]. It is shown that the isotropic results agree with the results from the commercial software ADS [7] and that the coupling has the same properties of coupled antennas shown in published literature [5]. The mutual coupling is the largest for the anisotropic values of ExI = 3.25 and Eyl = 5.12.…”

“…Then IIek and IIhk are substituted into the spectral domain expressions of (1) and (2) to represent the field in the k th layer. This results in the following spectral domain immittance functions in region 2 [2]: (5) where J X1 represents an x-directed diP2le curre~on layer 1, J X 2 represents an xdirected dipole current on layer 2 and Zxxl and Zxx2 are E,eferred t~as the spectral domain immittance functions. Once the expressions for Zxxl and Zxx2 ar~derived the moment method is used to solve for the unknown currents JXl and J x 2.…”

“…This is because it is well known that many microwave substrates actually posses anisotropic properties [4]. In the past significant work has been done to model the mutual coupling between printed dipoles in layered dielectrics [5]- [6]. But, in much of the previous work the layered material has been exclusively isotropic.…”

New Configuration of Handset MIMO Antenna for LTE 700 Band Applications

“…In this paper, we present a promising design of a handset antenna comprising a main antenna for the GSM850/900 (824∼960 MHz) and DCS/PCS (1.71∼1.99 GHz) bands and an auxiliary antenna covering the LTE 700 (746∼787 MHz) band to perform the MIMO operation. High isolation can be achieved by collinearly arranging the E-field directions of LTE MIMO antennas in the near-field region, because a collinearly arranged antenna has a lower mutual impedance than that of a broadside arranged antenna [10]. Moreover, low ECC is achieved by the pattern diversity technique, with LTE MIMO antennas symmetrically located on the top sides of the ground plane.…”

Coupling Reduction of Antenna Array Elements Using Small Interdigital Capacitor Loaded Slots

“…The fields can be decomposed to space waves, surface waves, and leaky waves [1]. To obtain high radiation efficiency and wide bandwidth, a substrate with lower permittivity and a thicker profile has been extensively used in microstrip antenna design.…”