EIRP LÀ GÌ

  -  

E.I.R.Phường.Quý khách hàng đã xem: Eirp là gì (Effective sầu Isotropic Radiated Power) - is an equivalent effective sầu isotropic radiated power defined as a power that would have sầu lớn be radiated by a hypothetical isotropic antenmãng cầu lớn achieve identical signal level in the direction of maximum radiation of a specific antenmãng cầu.”

In accordance khổng lồ Polish and EU regulations, the maximum power that can be used to lớn transmit in the specific WLAN frequency range (exceeding the power means that you are breaking the law):

2400,0 – 2483,5 MHz (2.4 GHz band) - power up to lớn 100 mW E.I.R.P.. (đôi mươi dBm),5150 – 5350 MHz (5 GHz band) - power up to lớn 200 mW E.I.R.Phường. (23 dBm) - for indoor use only,5725 – 5875 MHz (5 GHz band) - power up to 1000 mW E.I.R.P. (30 dBm).quý khách vẫn xem: Eirp là gì

Consider the following khổng lồ prsự kiện E.I.R.P. thresholds from being exceeded:

transmitter (e.g. network adapter, access point) output power,cable type, length và attenuation at operating frequency and connector attenuation, antenna power gain.

For a system including a transmitter (e.g. a wireless router), cable & antenmãng cầu, E.I.R.P.. is calculated from the following formula:

E.I.R.P. = P – l x Tk + Gi

Phường – transmitter power in dBml – cable length in metresTk – attenuation for 1 metre of cable at operating frequency of the transmitterGi - power gain of the isotropic antenna in dB

To simplify:

E.I.R.Phường. = transmitter power (dBm) + antenna gain (dBi) – cable attenuation (dB) – connector attenuation (dB)

To simplify, attenuation of a single connector is = 0.5 dB

Example. WLAN operating at 2,4 GHz band:

16 dBm access point, 8 dBi omnidirectional antenmãng cầu,8 metre cable TRI-LAN-240 (attenuation for 2.4 GHz is 0.4 dB / metre), i.e. 8 x 0.4 dB = 3.2 dB,two connectors – attenuation + 2 x 0.5 dB = 1 dB.

Calculation:

Example: for a 13 dBi gain antenna:

E.I.R.P.. = 16 dBm + 13 dBi – 3,2 dB – 1 dB = 24,8 dBm (i.e. exceeded by 4,8 dBm!)

Rethành viên, not all access points reduce the output power. Thus, it is better lớn use a high gain antenna & a low power transmitter than a low gain antenna và a high power transmitter. The devices operate not only in transmission, but also reception mode, & thus the sensitivity of the receiver is also important.




Bạn đang xem: Eirp là gì

*



Xem thêm: Bài Giảng Quy Hoạch Sử Dụng Đất Đai, Bài Giảng Quy Hoạch Sử Dụng Đất

*



Xem thêm: Mệnh Mang Tướng Tinh Trong Tử Vi Là Gì, Ý Nghĩa 14 Chính Tinh Trong Lá Số Tử Vi

$(document).ready(function() {var countdown=10138;$("#timecounter").text(currentTimeString(countdown));setInterval(function(){countdown--;//alert(countdown);if(countdown Especially recommendedIP DVR NVR4216-4KS2 16 CHANNELS DAHUANet: 239.39 EURAHD, HD-CVI, HD-TVI, PAL CAMERA APTI-H52V2-36W - 5Mpx 3.6mmNet: 32.96 EURIPhường CAMERA APTI-54C4-2812WP. - 5Mpx 2.8... 12mmNet: 81.53 EURAHD, HD-CVI, HD-TVI, PAL CAMERA APTI-H52V2-36W - 5Mpx 3.6mmNet: 32.96 EURMODULAR PLUG RJ45/C*P1000Net: 27.11 EURVIDEO BALUN TR-1D-HD*P2Net: 2.71 EURCAMERA BRACKET PFA137 DAHUANet: 10.87 EURMEDIA CONVERTERS ADAPTER OM-14Net: 103.78 EUROUTDOOR IR ILLUMINATOR 3N-80/60S2Net: 45.30 EURChuim mục: Hỏi Đáp