RADIOFREQUENCY TRANSMISSION DEVICE

摘要

A radiofrequency transmission device (D′) includes: a transmission unit (10) for transmitting a voltage signal (S) in pulsed form; a radiofrequency antenna (A); filtering elements (30′); and a voltage source (Vcc), wherein the filtering elements (30′) include:
“n” coils (B1, B2 . . . Bn), electrically connected in series, of which (n−1) coils each have a natural resonance frequency such that:;fRLi=i×fF each having an inductance (Li) such that, at the predetermined fundamental frequency:;LTOT=L1+L2+ . . . Li+ . . . Ln=ZTOT=Z1+Z2+ . . . Zi+ . . . Zn ;and;Li=Zi ;where
fRLi Is the natural resonance frequency of the i-th coili is a number varying from 2 to n,LTOT is the total inductance of the n coils,Li is the inductance of the i-th coil,ZTOT is the total impedance of the n coils,Zi is the impedance of the i-th coil,n is an integer greater than zero.

主权项

1. A radiofrequency transmission device (D′) comprising:
a transmission unit (10) for transmitting a pulsed voltage signal (S) at a predetermined fundamental frequency (fF), generating parasitic voltage signals at frequencies which are multiples of the predetermined fundamental frequency (fF), a radiofrequency antenna (A), matching means (M1′) for matching the transmission frequency of the antenna (A) to the value of the predetermined fundamental frequency (fF), filtering means (30′) for filtering the parasitic voltage signals, a voltage source (Vcc), connected to the matching means (M1) and supplying voltage to the transmission unit (10), wherein:
the filtering means (30′) are electrically connected to the transmission unit (10), and to the matching means (M1′), and said filtering means (30′) comprise: a number “n” of coils (B1, B2, Bi . . . Bn), electrically connected in series with each other, of which (n−1) coils (B2, B3, B4, . . . Bn) have a natural resonance frequency (fRLi) such that:
fRLi=i×fF where fRLi is the natural resonance frequency of the i-th coil (Bi) , i is a number varying from 2 to n, fF is the predetermined fundamental frequency. each having an inductance (Li) such that, at the predetermined fundamental frequency (fF):
LTOT=L1+L2+ . . . Li+ . . . Ln=ZTOT=Z1+Z2+ . . . Zi+ . . . Zn andLi=Zi where
LTOT is the total inductance of the “n” coils, Li is the inductance of the i-th coil (Bi), ZTOT is the total impedance of the “n” coils, Zi is the impedance of the “i-th” coil (Bi), n is an integer greater than zero.