Multi-band antenna
AssigneesOffice National d'Etudes et de Recherches Aerospatiales, Airbus Operations GmbH
InventorCédric Martel
Life of this patent
Estimating the term…
Abstract
A multi-band antenna (100) including a metal base plate (10) forming an electrical ground plane, and a plurality of metal patches (1 to 3) superimposed on top of the metal base plate. The metal patches are connected in parallel between a signal lead wire (11A) and the metal base plate. The metal patches have respective surface areas which increase with the distance of each metal patch from the metal base plate. The antenna provides as many different resonant frequency values as there are patches.
Claims18
A multi-band antenna comprising:
- a metal base plate configured as an electrical ground plane;
- and
- a plurality of metal patches each parallel to the metal base plate and which are each arranged at a different respective distance from the metal base plate,
- wherein the metal patches are each electrically connected to a common signal lead wire,
- wherein each metal patch is connected to the metal base plate, independently of the other metal patches, by at least one electrical circuit closure connection dedicated to the metal patch,
- wherein the metal patches are connected in parallel between the common signal lead wire and the metal base plate, and
- wherein the respective distances and respective surface area values of each of the metal patches are configured such that each of the metal patches with the respective said at least one electrical circuit closure connection dedicated to the metal patch forms a radiating element having at least one resonant frequency value different from resonant frequency values of the other radiating elements.
A method for manufacturing a multi-band antenna including a metal base plate and first and second metal patches both parallel to the metal base plate, wherein the first and second metal patches are connected to the metal base plate by a common signal lead wire, the first metal patch, but not the second metal patch, is connected to the metal base plate by a first electrical circuit closure connection, and the second metal patch, but not the first metal patch, is connected to the metal base plate by a second electrical circuit closure connection connecting, wherein the method comprises:
- for a first antenna, determine a surface area value of the first metal patch and a relative spacing distance value of a distance between the first metal patch and the metal base plate which achieves a first resonant frequency target value and a first spectral width of resonance for the first antenna;
- for a second antenna, setting a relative spacing distance value for a distance between the second metal patch and the metal base plate to a distance less than the spacing distance between the first metal patch and the metal base plate and determining a surface area value of the second metal patch to achieve a second resonant frequency target value and a second spectral width of resonance for the second antenna;
- adjusting the value of the spacing distance between the second metal patch and the metal base plate and/or the surface area value of said second metal patch to achieve a match between a ratio of the first and second resonant frequency target values and a quotient target value equal to a ratio of the first and second resonant frequency target values;
- and
- applying a common scale factor to the respective spacing distance values of the first and second metal patches and/or to dimensions of said first and second metal patches to adjust the first resonant frequency value to match the first resonant frequency target value.
Dependencies are inferred from the claim text.