Nodes for high frequency fixed wireless access network
A high frequency data network access system leverages commodity WiFi chipsets and specifically multi spatial stream (e.g., 802.11 ac) chipsets in combination with electrically steered patch array antenna systems at the subscriber nodes. In addition, for thermal control, the high frequency components are mounted to a main body that includes a heat sink and a chimney. These components are also separated from components operating at baseband to avoid interference.
1. A node supporting a communications link to an aggregation node in an access network, the node comprising:
a modem board for communicating with a router for maintaining a local area network for a premises and decoding intermediate frequency downlink signals encoding communications on a downlink from the aggregation node and encoding communications into intermediate frequency signals for an uplink to the aggregation node;
an extremely high frequency board for up converting the intermediate frequency uplink signals into high frequency uplink signals for transmission to the aggregation node and down converting high frequency downlink signals transmitted from the aggregation node into the intermediate frequency downlink signals;
an electronically steered patch antenna array for receiving the high frequency downlink signals and transmitting the high frequency uplink signals, the electronically steered patch antenna array steering by applying different delay settings for respective columns of the patch antenna array; and
a network processor controlling phase adjustments of the high frequency downlink signals from the high frequency uplink signals to the patch antenna array to establish the link to the aggregation node.
2. The node as claimed in claim 1 , wherein the electronically steered patch antenna array is a one-dimensionally electronically steered patch antenna array for steering the antenna in azimuth.
3. The node as claimed in claim 2 , further comprising a one-dimensionally adjustable mechanical pointing system for adjusting a boresight of the patch antenna array in elevation.
4. The node as claimed in claim 2 , further comprising transmit gain and phase adjusters for adjusting a gain and phase of the high frequency uplink signals provided to columns of the patch antenna array.
5. The node as claimed in claim 2 , further comprising receive gain and phase adjusters for adjusting a gain and phase of the high frequency downlink signals received by each column of the patch antenna array.
6. The node as claimed in claim 1 , further comprising:
an outer radome, the electronically steered patch antenna array being located in the outer radome.
7. The node as claimed in claim 1 , further comprising:
a main body, wherein the extremely high frequency board mounted to one side of the main body and the modem board is mounted to another side of the main body.
8. The node as claimed in claim 7 , further comprising:
an outer radome, the main body being installed in the radome.
9. The node as claimed in claim 8 , wherein the outer radome seals against the main body.
10. The node as claimed in claim 7 , wherein the main body includes a center heat sink.
11. The node as claimed in claim 7 , wherein the main body includes a chimney extending through the main body.
12. The node as claimed in claim 7 , further comprising a rear plate, the modem board being held between the main body and the rear plate.
13. The node as claimed in claim 12 , wherein the rear plate includes a rear heat sink.
14. The node as claimed in claim 12 , wherein the rear plate seals against the main body,
15. A node supporting a communications link to an aggregation node in an access network, the node comprising:
a one-dimensionally electronically steered patch antenna array for steering the antenna in azimuth, the electronically steered patch antenna array steering by applying different delay settings for respective columns of the patch antenna array; and
a one-dimensionally adjustable mechanical pointing system for adjusting a boresight of the patch antenna array in elevation.
16. A node supporting a. communications link to an aggregation node in an access network, the node comprising:
an outer radome; an antenna system in the radome;
a main body;
an extremely high frequency board mounted to one side of the main body for down converting high frequency downlink signals received by the antenna system and up converting to generate high frequency uplink signals for transmission by the antenna system; and
a modem board mounted on another side of the main body for communicating with a router for maintaining a local area network for a premises.