Antenna on a wireless untethered device such as a chip or printed circuit board for harvesting energy from space
View Patent ↗A wireless untethered device which may be an integrated circuit chip or printed circuit board having at least one integrated antenna and circuitry operatively associated with the antenna for receipt of energy harvested from space by the antenna. The antenna has an effective area greater than its physical area. A system which receives power from the harvested energy after the energy is processed by the circuitry may also be provided with mismatched impedance between the antenna and a circuit resistance.
1. A wireless untethered device comprising:
at least one antenna;
circuitry operatively associated with said antenna for receipt of energy harvested by said antenna from space, said circuitry being structured to convert said energy to direct current; and
a system structured to be energized by the direct current from said circuitry, said system and said circuitry having an impedance mismatch with respect to said antenna wherein said antenna, said circuitry and said system together form an integrated antenna and wherein said antenna has an effective area greater than its physical area.
2. The wireless untethered device of claim 1 including
said wireless untethered device being selected from the group consisting of an integrated circuit chip and a printed circuit board.
3. The wireless untethered device of claim 1 including
said wireless untethered device being an integrated circuit chip.
4. The integrated circuit chip of claim 3 including
said antenna being integrally formed on said chip.
5. The integrated circuit chip of claim 4 including
said antenna structured to receive RF energy and deliver it to said circuitry.
6. The integrated circuit chip of claim 4 including
a second integral antenna for transmitting data.
7. The integrated circuit chip of claim 4 including
said antenna being a spiral antenna.
8. The integrated circuit chip of claim 7 including
said spiral antenna being a square spiral.
9. The integrated circuit chip of claim 3 including
said circuitry having a tank circuit for increasing the effective area of said antenna.
10. The integrated circuit chip of claim 5 including
said antenna having a length of about ¼ wavelength of said RF energy.
11. The integrated circuit chip of claim 3 including
a micro-strip feed line connected to said antenna.
12. The integrated circuit chip of claim 3 including
said circuitry having a non zero resistance which results in retransmission of some of said energy to thereby interfere with transmitted energy and increase the effective area of said antenna.