Integrated filter in antenna-based detector
View Patent ↗An antenna system includes a dielectric structure formed on a substrate; an antenna, partially within the dielectric structure, and supported by the dielectric structure; a reflective surface formed on the substrate. A shield blocks radiation from a portion of the antenna and from at least some of the dielectric structure. The shield is supported by the dielectric structure.
1. An antenna system comprising:
a dielectric structure;
an antenna, partially within the dielectric structure, and supported by the dielectric structure; and
a detection system disposed to detect electrical field changes in the antenna,
wherein:
the antenna comprises:
a first metal portion on one side of the dielectric structure;
a middle portion comprising a portion of the dielectric structure; and
a second metal portion on another side of the dielectric structure, and the first metal portion and the second metal portions are comprised of different metals.
2. A system as in claim 1 wherein the dielectric structure is formed on a substrate, the system further comprising:
a reflective surface formed on the substrate.
3. A system as in claim 1 further comprising:
a shield blocking radiation from a portion of the antenna.
4. A system as in claim 3 wherein the shield also blocks radiation from the dielectric structure.
5. A system as in claim 3 wherein the shield is supported by the dielectric structure.
6. A system as in claim 1 wherein the length of the first metal portion is substantially equal to the length of the second metal portion.
7. A system as in claim 6 wherein the length of the dielectric portion of the antenna is based, at least in part, as a function of the dielectric constant of the dielectric material.
8. A system as in claim 1 wherein the detection system includes a source of charged particles.
9. A system as in claim 1 wherein the first metal portion and the second metal portions are comprised of the same metal.
10. An antenna comprising:
a dielectric portion having a first length;
a first metal portion having a second on a first side of the dielectric portion; and
a second metal portion, different from the first metal portion, having a third length on a second side of the dielectric portion;
wherein the antenna is constructed and adapted to detect electromagnetic waves having a particular frequency, and
wherein the first length, second length, and third length are each based, at least in part, on a function of the particular frequency.
11. An antenna system comprising:
a first antenna portion;
a second antenna portion on a first side of the first antenna portion; and
a third antenna portion on a second side of the first antenna portion,
a shield blocking radiation from at least a part of the antenna; and
a detection system disposed to detect electrical field changes in the antenna, wherein the detection system includes a source of charged particles, wherein:
the first antenna portion and the third antenna portion comprise a first metal
the second antenna portion comprises a second metal,
the first antenna portion and the third antenna portion comprise a first dielectric material; and
the second antenna portion comprises a second dielectric material.
12. An antenna system as in claim 11 wherein:
the first antenna portion and the third antenna portion comprise a metal; and
the second antenna portion comprises a dielectric material.