What is the Difference Between Ka-band and Ku-band in Satellite Communications?

时间： 2022-03-30 来源：UIY

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The Ka-band with frequency range 26.5 ~ 40GHz, is part of the microwave band of the electromagnetic spectrum. In other words, the band is directly above the K-band.

The Ka-band is also known as the 30/20GHz band and is commonly used for satellite communications.

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The disadvantage of the Ka-band is that the rain attenuation is relatively high, and the requirements for devices and processes are relatively high.

At Ka-band, the antenna size of the Ka end user is not mainly limited by the antenna gain, but by the ability to suppress interference from other systems.

The Ku-band refers to a lower frequency band than the K band under the IEEE 521-2002 standard. The Ku-band usually ranges from 10.7 to 12.75GHz in the downlink and 12.75 to 18.1GHz in the uplink.

The Ku band is the live satellite band.

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Differences:

(1) Different frequency resources, the available bandwidth of Ku is not as much as that of Ka.

(2) The antenna gain is different, which determines that the Ka can use a smaller size antenna.

(3) The anti-rain attenuation ability is different. The higher the frequency, the worse the anti-rain attenuation ability.

(4) The satellite design is different.

The popular Ka satellites in the world are all designed with spot beams, and it is required to do beam switching under the same satellite.

Ku is generally a large beam, no need to switch under the same satellite.

(5) Spot beams can be beam multiplexed, and the bandwidth utilization rate also increases, so the cost per unit bandwidth of Ka is reduced.

(6) Satellite companies operate differently.

Ku runner often rents in MHz, and users build their own platforms.

Ka is to rent in Mbps, and users only buy terminals to access the network.

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产品型号	品类	Freq. Range(MHz、GHz)	Insertion Loss Max(dB)	Isolation Min(dB)	VSWR Max	Forward Power(W)	Reverse Power(W)	Connector Type	Temp.(℃)
UIYWC6880A54T59	波导环行器	5.4 ~ 5.9 GHz	0.3	23	1.2	100	100	WR137(BJ70)	-40 ~ +85

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优译宽带隔离器、波导隔离器、同轴隔离器、微带隔离器、微带基片隔离器、射频隔离器、嵌入式带线隔离器、表面封装隔离器(SMT隔离器)、双节隔离器，提供多种频率范围，VSWR：1.15-1.45，VSWR Max：1.15-1.9，Forward Power(W)：2-1500W，Reverse Power(W)：1-300W，低插损、高隔离、高功率；可按客户要求定制.

产品型号	品类	Freq. Range(MHz、GHz)	Insertion Loss Max(dB)	Isolation Min(dB)	VSWR	Forward Power(W)	Reverse Power(W)	Connector Type	Temp.(°C)
UIYCDI16080A25T30SF	双节隔离器	25 ~ 30 MHz	7	24	1.45	50	50	SMA-F	+10 ~ +60

选型表 - 优译立即选型

UIYBCC1316A 26.5 to 40GHz – Coaxial Circulator

型号- UIYBCC1316A,UIYBCC1316A265T40KF

数据手册 - 优译 - Ver. 5.0 - 2023/9/18 PDF 英文下载查看更多版本

一文解析毫米波以及其应用

毫米波波长为1～10毫米的电磁波称毫米波，它位于微波与远红外波相交叠的波长范围，因而兼有两种波谱的特点。毫米波频段没有太过精确的定义，通常将26.5~300GHz的频域的电磁波称毫米波。本文优译将介绍毫米波以及其应用。

原厂动态发布时间 : 2022-03-03

UIYBCC1318B 12 to 18GHz – Coaxial Circulator

型号- UIYBCC1318B12T18SMTSFTSF,UIYBCC1318B,UIYBCC1318B12T18SFTSMTSF,UIYBCC1318B12T18SF

数据手册 - 优译 - Ver. 5.1 - 2023/3/3 PDF 英文下载查看更多版本

优译宽带/双节环行器选型表

优译宽带环行器/双节环行器选型，多种频率范围，VSWR Max:1.15-1.9，Forward Power(W)：10-500W，Reverse Power(W)：3-500W，低插损、高隔离、高功率；可按客户要求定制。

产品型号	品类	Freq. Range (MHz、GHz)	Insertion Loss (1-2)Max(dB)	Isolation (2-1)Min(dB)	VSWR Max	Forward Power(W)	Reverse Power(W)	Connector Type	Temp.(°C)
UIYCDC16080A25T30SF	双节环行器	25 ~ 30 MHz	7	24	1.45	50	50	SMA-F	+10 ~ +60