Capsule type medical device
A capsule type medical device having a substrate section that includes at least a single layer substrate; an antenna conductor that is arranged on and closely attached to at least one surface of the substrate section; a transmitting circuit that is arranged on the one surface of the substrate section within an area surrounded by the antenna conductor; and a plurality of lands that are arranged to another surface of the substrate section, and electrically connected with the transmitting circuit.
1. A capsule type medical device comprising:
a flexible substrate with a printed circuit; and
a radio communication unit mounted on the flexible substrate,
wherein the radio communication unit comprises:
a substrate section having a rigid substrate with a printed circuit;
an antenna conductor that is arranged on one surface of the rigid substrate;
a transmitting circuit that is arranged on the one surface of the rigid substrate and electrically connected with the antenna conductor by the printed circuit of the rigid substrate; and
a plurality of first lands that are arranged to another surface of the rigid substrate, and electrically connected with the transmitting circuit; and
the flexible substrate includes a plurality of second lands provided on a first surface of the flexible substrate;
wherein the first and second lands are directly joined together.
2. The capsule type medical device according to claim 1 , wherein the antenna conductor is C-shaped or spiral-shaped.
3. The capsule type medical device according to claim 1 , wherein
the antenna conductor is spiral-shaped,
the number of turns of the antenna conductor is in the range of 1.5 to 2.5 turns, and
at least a part of the antenna conductor is embedded in the substrate section and arranged cubically.
4. The capsule type medical device according to claim 1 , wherein when the antenna conductor is arranged planarly, the thickness of the antenna conductor is smaller than the outermost diameter of the antenna conductor.
5. The capsule type medical device according to claim 1 , wherein when at least a part of the antenna conductor is embedded in the substrate section and arranged cubically, the height of the antenna conductor is smaller than the outermost diameter of the antenna conductor.
6. The capsule type medical device according to claim 1 , wherein the thickness of the antenna conductor is in the range of 0.01 to 2 mm.
7. The capsule type medical device according to claim 1 , wherein the substrate section is circular disk-shaped.
8. The capsule type medical device according to claim 1 , wherein the outermost diameter of the antenna conductor is in the range of 60% to 100% of the outermost diameter of the substrate section.
9. The capsule type medical device according to claim 1 , wherein specific gravity of the capsule type medical device is less than one.
10. The capsule type medical device according to claim 1 , wherein the transmitting circuit is surrounded by the antenna conductor.
11. The capsule type medical device according to claim 1 , wherein the substrate section includes first and second substrates;
the capsule type medical device further comprises:
a first antenna conductor arranged on a surface of the first substrate; and
a second antenna conductor arranged between the first and second substrates, wherein
the first and second antenna conductors are linked together to form a cubic antenna conductor.