Modified wet tip antenna design
A microwave antenna including a feedline, a radiating section, an inflow hypotube, a puck, a transition collar and a sleeve. The feedline includes a coaxial cable including an inner and outer conductor, and a dielectric disposed therebetween. The radiating section includes a dipole antenna coupled to the feedline and a trocar coupled to the distal end of the dipole antenna. The inflow hypotube is disposed around the outer conductor and configured to supply fluid to the radiating portion. The puck includes at least two ribs with inflow slots defined between two adjacent ribs. The transition collar is coupled to the distal end of the inflow hypotube and the first end of the puck. The transition collar includes at least two outflow slots configured to receive fluid from a distal end of the inflow hypotube and to transition the fluid from the outflow slots to a distal end of the radiating section. The sleeve overlays the two outflow slots of the transition collar, the puck and at least the distal portion of the radiating section. The sleeve forms a fluid-tight seal with the transition collar proximal the outflow slots and defines a first gap for transitioning the fluid to exit the outflow slots of the transition collar to the distal end of the radiating section.
1. A microwave antenna, comprising:
a feedline including a coaxial cable having an inner conductor, an outer conductor, and a dielectric disposed therebetween;
an inflow tube disposed around the outer conductor; and
a radiating section coupled to the feedline, the radiating section including a choke and a dielectric transition collar directly coupled to the choke, the dielectric transition collar having a proximal end and a distal end, the proximal end of the dielectric transition collar being coupled to a distal end of the inflow tube and forming a fluid-tight seal therebetween, the dielectric transition collar further including at least one slot fluidly coupling the distal end of the inflow tube to a distal end of the radiating section such that a fluid flows through the dielectric transition collar to the distal end of the radiating section.
2. The microwave antenna according to claim 1 , further comprising an outer tube concentrically disposed over the inflow tube and coupled to the distal end of the radiating section, the outer tube and the inflow tube defining a first gap therebetween configured to receive the fluid from the distal end of the radiating section.
3. The microwave antenna according to claim 1 , further comprising a sleeve disposed over the at least one slot and at least a portion of the distal end of the radiating section, the sleeve and the dielectric transition collar defining a second gap therebetween fluidly coupling the at least one slot to the distal end of the radiating section.
4. The microwave antenna according to claim 2 , wherein the inflow tube and the outer tube are formed from a conductive material.
5. The microwave antenna according to claim 3 , wherein the sleeve is formed from a dielectric material.
6. The microwave antenna according to claim 5 , wherein the dielectric material is a polyimide.
7. The microwave antenna according to claim 3 , wherein the sleeve has a wall thickness less than 0.010 inches.
8. The microwave antenna according to claim 1 , further comprising a puck having a proximal end and a distal end, the proximal end of the puck being coupled to the distal end of the dielectric transition collar.
9. The microwave antenna according to claim 8 , wherein the puck includes a plurality of ribs longitudinally extending from the proximal end of the puck to the distal end of the puck and defining a plurality of channels.
10. The microwave antenna according to claim 8 , wherein the puck is injection molded and forms a water-tight seal around the outer conductor.
11. The microwave antenna according to claim 1 , wherein the radiating section further includes an electromagnetic field (EMF) shield disposed around a portion of the radiating section.
12. A microwave antenna, comprising:
a feedline including a coaxial cable having an inner conductor, an outer conductor, and a dielectric disposed therebetween;
an inner tube disposed around the outer conductor;
an outer tube concentrically disposed over the inner tube; and
a radiating section coupled to the feedline, the radiating section including a choke and a dielectric transition collar directly coupled to the choke, a distal end of the inner tube and the outer tube forming a fluid-tight seal therebetween, the dielectric transition collar further defining at least one slot fluidly coupling the distal end of the inner tube to a distal end of the radiating section and at least one gap defined by the dielectric transition collar and the outer tube fluidly coupling the distal end of the outer tube to the distal end of the radiating section such that a fluid flows through the dielectric transition collar to the distal end of the radiating section.
13. The microwave antenna according to claim 12 , further comprising a sleeve disposed over the at least one slot and at least a portion of the distal end of the radiating section, the sleeve and the dielectric transition collar defining a second gap therebetween fluidly coupling the at least one slot to the distal end of the radiating section.
14. The microwave antenna according to claim 13 , wherein the sleeve has a wall thickness less than 0.010 inches.
15. The microwave antenna according to claim 13 , wherein the sleeve is formed from a dielectric material.
16. The microwave antenna according to claim 15 , wherein the dielectric material is a polyimide.
17. The microwave antenna according to claim 12 , further comprising a puck having a proximal end and a distal end, the proximal end of the puck being coupled to the distal end of the dielectric transition collar.
18. The microwave antenna according to claim 17 , wherein the puck includes a plurality of ribs longitudinally extending from the proximal end of the puck to the distal end of the puck and defining a plurality of flow channels.
19. The microwave antenna according to claim 17 , wherein the puck is injection molded and forms a water-tight seal around the outer conductor.
20. The microwave antenna according to claim 12 , wherein the radiating section further includes an electromagnetic field (EMF) shield disposed around a portion of the radiating section.
21. The microwave antenna according to claim 12 , wherein the inner tube and the outer tube are formed from a conductive material.