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 for detecting electromagnetic radiation, comprising:
a dielectric structure;
an antenna, partially within the dielectric structure, and supported by the dielectric structure, comprising:
a first metal portion having a length l v ;
a filter portion comprising a portion of the dielectric structure adjacent the first metal portion on a first side of the filter portion and having a length l d which is a function of both l v and the dielectric constant of the dielectric structure, and
a second metal portion on a distal side of the filter portion; and
a detection system disposed to detect electrical field changes in the antenna.
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. A system as in claim 1 wherein the first metal portion and the second metal portions are comprised of different metals.
11. An antenna as in claim 1 wherein the length l d is substantially equal to
l
d
=
l
v
e
d
+
e
m
e
d
(
e
m
+
1
)
,
where e d is the dielectric constant of the dielectric structure and e m is the dielectric constant of at least one of the first and second metal portions.
12. An antenna system comprising:
a dielectric structure formed on a substrate;
an antenna, partially within the dielectric structure, and supported by the dielectric structure, comprising:
a first metal portion having a length l v ;
a filter portion comprising a portion of the dielectric structure adjacent the first metal portion on a first side of the filter portion and having a length l d which is a function of both l v and the dielectric constant of the dielectric structure, and
a second metal portion on a distal side of the filter portion;
a reflective surface formed on the substrate;
a shield blocking radiation from a portion of the antenna and from at least some of the dielectric structure, the shield being supported by the dielectric structure; and
a detection system disposed to detect electrical field changes in the antenna, wherein the detection system includes a source of charged particles.
13. An antenna comprising:
a dielectric filter portion;
a first metal portion on a first side of the dielectric filter portion; and
a second metal portion on a distal side of the dielectric filter portion, wherein the first metal portion and the second metal portion are comprised of a different metal.
14. An antenna as in claim 13 wherein the antenna is constructed and adapted to detect electromagnetic waves having a particular frequency, and wherein
a first length of the first metal portion and a second length of the second metal portion and a third length, of the dielectric filter portion, are each based, at least in part, on a function of the particular frequency.
15. An antenna as in claim 13 wherein the first length is substantially the same as the second length.
16. An antenna system comprising:
a first antenna portion comprising a first metal;
a second antenna portion on a first side of the first antenna portion, comprising a second metal different from the first metal;
a third antenna portion on a distal side of the first antenna portion, comprising of said second metal; and
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.
17. An antenna system comprising:
a first antenna portion comprising a first dielectric material;
a second antenna portion on a first side of the first antenna portion comprising a second dielectric material; and
a third antenna portion on a second side of the first antenna portion, comprising of said second dielectric material;
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.
18. An antenna system comprising:
a first antenna portion comprising a dielectric;
a second antenna portion on a first side of the first antenna portion comprising a metal; and
a third antenna portion on a second side of the first antenna portion, comprising a metal;
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.