KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Settings

Subject: search.filters.subject.Small antenna

Search Results

Now showing 1 - 3 of 3
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Study of the limitation of characteristic modes using the far-field based reconstruction technique for complex antenna structures
    (2021-05-19)
    Eardprab, Sanchai
    ;
    Phongcharoenpanich, Chuwong
    ;
    Torrungrueng, Danai
    This paper presents the study of the characteristic mode simulation and the limitation of the far-field based reconstruction technique for complex antenna structures. The characteristic modes can also be reconstructed based on the radiated far fields obtained from simulations or measurements. Traditionally, the characteristic modes are usually calculated by using the method of moments (MoM) to determine the impedance matrix and associated eigenvalues and eigenvectors in order to calculate the current distribution on antenna structures and associated radiated far fields. In an inverse approach, the characteristic modes can also be reconstructed based on the radiated far fields obtained from simulations or measurements. The characteristic modes of a relevant simplified antenna structure and the related far fields are used to approximate characteristic modes of more complex antenna structures. It has been shown in the literature that characteristic modes can be reconstructed with good accuracy for simplified antenna structures with small perturbation. However, when the antenna structures are more complex or the structure perturbation is larger over the important part of antenna structures associated with dominant characteristic modes, the far field based reconstruction of these modes may not be sufficiently accurate due to significant mode perturbation. In this paper, the limitation of the far-field based reconstruction technique is investigated. The parametric studies of the structure perturbation are performed in terms of scaling and location on antenna structures to determine the limitation of the method. The proper perturbation remaining dominant modes are discussed as well.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    A Monolithic Patch Antenna on a Semi-insulated Alumina (Al2O3) Substrate for Active Integrated Antenna
    (2020-12-01)
    Promwong, Sathaporn
    ;
    Pinsakul, Atcharaporn
    Small antenna technology is very important for monolithic patch antenna on semiconductor substrate. The active integrated antenna is analyzed by using cavity model and method of moment. Alumina substrate doped with gold is a new substrate having the resistivity more than 10 <sup>6</sup> (Ω · cm). This substrate yields good performance for the monolithic patch antenna and it is easy to fabricate with the active integrated antenna In addition, a small antenna using the alumina substrate is obtained and applied to monolithic microwave integrated circuit. The computed numerical results are in good agreement with the measured results.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Evaluation of small antenna based si-substrate with heat process for wireless sensor applications
    (2020-07-01)
    Pinsakul, Atcharaporn
    ;
    Pathoumvanh, Somsanouk
    ;
    Promwong, Sathaporn
    A silicon substrate small patch antenna for small antenna is using cavity model and method of moment are analyse antenna. Dope Silicon substrate with gold is having the resistivity over 106. It's good performance for monolithic patch antenna. Calculated numerical results are in awesome agreement with the computed results.