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Solution of
setting up an antenna at a sweet spot

Signal attenuates in the presense of obstructions such as trees and buildings. It makes a difference if you could put your antenna in a sweet spot with minimal obstructions.

Sometimes a sweet spot for setting up an antenna is near a far corner by a window or at an attic overseeing the remote Wi-Fi hotspot.

The problem would then be running a long RF coaxial cable with so much signal loss that completely offsets the signal gain at the sweet spot.

For instance, the signal loss of a 50ft cable RG-58 is 16.1dB at 2.4GHz. If the antenna gain is 18dB, it could be reduced to 18dB - 16.1dB or 1.9dB.

In order to eliminate the use of RF coaxial cable, you need a USB-to-Ethernet coverter, so that it extends digital signal over the Ethernet cable that could go as far as 1000ft without signal loss.

The TurboTenna Ethernet Gateway is such a coverter and it is an upgrade kit for the 2200mW NextG USB-Yagi directional antenna.

The Ethernet cable terminates at the WAN port of a 802.11n or 802.11ac router that you could establish as your in-house hotspots for sharing the Internet with phone, touchpad, notebook, macbook.

Ethernet Gateway Connectivity
2200mW USB-Yagi antenna USB
WAN port of wireless router Ethernet

If your power in-house mains sockets are under the same grid, Ethernet power adapter (EPA) devices might be used to eliminate running a cable between the gateway and router. However, the link quality of EPA depends on the transient power factor in your grid. It is not uncommon to see reports of transmission interruptions followed by manual reset after spikes caused by power on/off of house appliances.

Attenuation of RF coaxial cables in Amateur and ISM Bands in dB/ 100 ft (dB/100 m)

Cable Type 144 MHz 220 MHz 450 MHz 915 MHz 1.2 GHz 2.4 GHz 5.8 GHz
RG-58 6.2

(20.3)

7.4

(24.3)

10.6

(34.8)

16.5

(54.1)

21.1

(69.2)

32.2

(105.6)

51.6

(169.2)

RG-8X 4.7

(15.4)

6.0

(19.7)

8.6

(28.2)

12.8

(42.0)

15.9

(52.8)

23.1

(75.8)

40.9

(134.2)

LMR-240 3.0

(9.8)

3.7

(12.1)

5.3

(17.4)

7.6

(24.9)

9.2

(30.2)

12.9

(42.3)

20.4

(66.9)

RG-213/214 2.8

(9.2)

3.5

(11.5)

5.2

(17.1)

8.0

(26.2)

10.1

(33.1)

15.2

(49.9)

28.6

(93.8)

9913 1.6

(5.2)

1.9

(6.2)

2.8

(9.2)

4.2

(13.8)

5.2

(17.1)

7.7

(25.3)

13.8

(45.3)

LMR-400 1.5

(4.9)

1.8

(5.9)

2.7

(8.9)

3.9

(12.8)

4.8

(15.7)

6.8

(22.3)

10.8

(35.4)

 

 
 
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