Information handling system antenna isolation with integrated cooling fan
A portable information handling system structure located between housing hinges along one side of the housing has first and second antenna disposed at opposing ends with a cooling fan between the first and second antenna and over the antenna structure to isolate the first and second antenna. In one embodiment, a parasitic element disposed between the first and second antenna and under the cooling fan has resonance tuned to isolate wireless signals of a frequency supported by the first and second antenna.
1. An information handling system comprising:
a housing;
a motherboard coupled to the housing;
a processer coupled to the motherboard and operable to execute instructions that process information;
a memory coupled to the motherboard and interfaced through the motherboard with the processor, the memory operable to store the instructions and information;
a radio interfaced with the processor, the radio operable to communicate wireless signals;
first and second antenna interfaced with the radio and disposed at one side of the housing, the first and second antenna operable to transmit and receive the wireless signals;
a cooling fan coupled to the motherboard and having an exhaust at the one side of the housing;
an antenna support separate from the motherboard and disposed along the one side, the first and second antenna coupled to the antenna support;
a parasitic element coupled to the antenna support and disposed under the cooling fan; and
a tuning circuit interfaced with the parasitic element and operable to tune the parasitic element to isolate the antenna based upon antenna transmission frequency;
wherein the cooling fan extends over the antenna support between the first and second antenna.
2. The information handling system of claim 1 wherein:
the motherboard is formed to have an opening sized to fit the cooling fan; and
the cooling fan is inserted in the opening to couple to the motherboard.
3. The information handling system of claim 1 further comprising:
a heat pipe coupled at a first end to the cooling fan and at an opposing second end to the processor;
wherein the tuning circuit adapts the parasitic element to isolate the antenna in part based upon a length of the heat pipe between the first and second ends.
4. The information handling system of claim 1 further comprising a keyboard cover coupled over the keyboard, the keyboard cover having a conductive material with a non-conductive material aligned over the antenna support.
5. The information handling system of claim 4 further comprising plural conductive members extending downward from the keyboard cover towards the motherboard, at least one conductive member extending downward between the motherboard and each antenna.
6. The information handling system of claim 4 wherein:
the conductive material comprises aluminum; and
the non-conductive material comprises plastic.
7. An information handling system comprising:
a housing;
a motherboard coupled to the housing;
a processer coupled to the motherboard and operable to execute instructions that process information;
a memory coupled to the motherboard and interfaced through the motherboard with the processor, the memory operable to store the instructions and information;
a radio interfaced with the processor, the radio operable to communicate wireless signals;
first and second antenna interfaced with the radio and disposed at one side of the housing, the first and second antenna operable to transmit and receive the wireless signals;
a cooling fan coupled to the motherboard and having an exhaust at the one side of the housing;
an antenna support separate from the motherboard and disposed along the one side, the first and second antenna coupled to the antenna support;
wherein the cooling fan extends over the antenna support between the first and second antenna;
wherein the housing comprises first and second portions, the information handling system further comprising:
a display integrated in the first housing portion;
a keyboard integrated in the second housing portion over the motherboard; and
first and second hinges rotationally coupling the first and second housing portions;
wherein the antenna support and cooling fan are disposed in the second housing portion between the first and second hinges.