From email...

Two new Vertex 7200 Antenna Controllers are for sale now.



Including operating manual.

My comment: I have been pleased to use the same type antenna tracking controllers at a number of large antenna sites with no problems. Ideal for new installs or as spares/back-up for existing installations. It is good that an operating manual is included in the offer.

If interested and for more information go here:
https://newerasystems.net/shop/antennas/antenna-controllers/vertex-7200-antenna-...

Please contact:
Phil Thomas
Phone : 1-321 327 3560
Email : pthomas@newerasystems.net

Best regards, Eric (forum admin)

In emergency disaster relief, keeping communication smooth is an important condition to reduce disaster losses and reduce the impact of disasters, and satellite mobile communication is an effective means to ensure smooth communication. As an economical, practical and reliable emergency communication mode, portable flyaway antenna plays an important role in the application of satellite mobile communication in emergency and disaster relief.

Through previous blogs, we have introduced the portable flyaway antenna in detail, including flyaway antenna types, its packaging method, classic cases of previous portable flyaway projects around the world, and a collection of installation videos. Among them, regarding the application of portable station antennas, we mainly listed the general application of portable station antennas, including news broadcasting, expedition applications and disaster relief emergency communications, among which the most widely used is emergency communications in disaster relief. Today we will analyze the working principle, networking mode and characteristics of the portable station in emergency relief in this article. For details, please continue reading as follows.

General applications of portable flyaway antennas

*Business (Remote office video meeting, telemedicine)
*Defence (Police remote command and border communication)
*Emergency communication (Disaster relief, adventure and exploration)
*Media (Event broadcasting and breaking news interview)
*Energy distribution (Oil and gas exploration networks)



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1 System composition and work principle of portable flyaway antenna satellite communication

Portable satellite communication earth station is a satellite communication system that meets the requirements of emergencies in special environments, and can be carried manually by hand or on the back. It forms a satellite communication link with the remote main station through the satellite, and performs data communication, voice communication, image communication and other business transmissions according to actual needs.

1.1 System Composition of portable flyaway antenna satellite communication

Fig.1 Portable flyaway antenna system diagram
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The flyaway antenna system consists of an assembled reflector antenna, a combined feed, a low-noise down-converter (LNB), an up-conversion power amplifier component (BUC), an antenna pedestal and an antenna servo module, a tracking receiver module, a satellite communication module, and an image encoder module, power supply module and other equipment. The principle of the system is shown in Figure 1.
1.2  Working principle of portable flyaway antenna satellite communication
When using a portable satellite communication earth station, first open the antenna box, manually assemble the main reflector of the antenna, connect the cables between the boxes and turn on the power.

After the device is turned on, the antenna servo control module determines the position of the antenna and the attitude of the antenna pedestal through the inclinometer and GPS, calculates the best polarization matching angle for the satellite beam, and controls the polarization motor to make the polarization angle of the antenna matches the polarization angle of the satellite beam. At the same time, the antenna servo control module drives the azimuth and elevation motors according to a certain automatic control algorithm to search for the satellite beacon beam. The portable satellite communication flyaway antenna adopts the combination of open-loop search and closed-loop tracking for satellite searching. In the open-loop search process, the servo system first sets the tracking receiver to the preset beacon signal frequency according to the beacon frequency of satellite, and at the same time rotates the elevation of the antenna to theoretical calculation value, after the elevation angle is basically determined, according to the tracking theory, the satellite corresponding to the preset beacon frequency can be found by rotating the azimuth, which is the satellite.

After the antenna receives the signal from the satellite beacon, it is amplified by the LNB and divided into two channels by the directional coupler, and one signal is output to the tracking receiver to complete the detection, filtering and amplification of the signal, and provide signal level indication for the servo control. Adjust the attitude of the antenna so that the antenna receives the maximum signal level, that is, the antenna beam is aimed at the satellite. At this time, the antenna enters the step tracking state. In the step tracking state, when the signal is greater than a certain preset threshold, the antenna pointing is in the hold state; when the signal is smaller than the preset threshold, the antenna automatically enters the step tracking state, and the servo control module ensures that the antenna pointing is always aligned by adjusting the antenna attitude Satellite, maintain optimal reception performance. The other signal is transmitted to the baseband unit after being down-converted and demodulated, and then output to the user terminal after baseband processing. At the same time, the output signal of the user terminal is processed by the baseband unit, then modulated, up-converted, and then transmitted to the satellite through the antenna through the power amplifier. So far, a complete satellite communication link has been established. Through the satellite link, the portable satellite communication earth station can carry out various business transmissions with the remote station.

1.3 Features of portable flyaway antenna satellite communication system

Compared with other emergency communication equipment, the portable satellite communication earth station flyaway antenna has the following characteristics:

(1) Small size, light weight, easy to carry.

In the case of sudden natural disasters and post-disaster traffic interruptions, portable satellite communication earth stations are small in size, light in weight, and easy to carry. Therefore, on the one hand, they are easy to stow when disasters strike, and provide conditions for contacting rescue. On the other hand, it can be provided to the disaster-stricken area by means of piggyback or airdrop, and a disaster relief emergency communication system can be built in time to provide reliable guarantee for disaster relief.

(2) Strong environmental adaptability.

The portable satellite communication earth station has strong environmental adaptability, can work in a small space, and has low energy consumption, which is easy to replenish energy.

(3) Easy to operate.

The structure of the portable satellite communication earth station is simple, and it is light and quick to deploy. If equipped with remote control technology, the operation of the portable satellite communication earth station with quick and automatic satellite aligning. Non-professionals can complete the opening of the portable satellite communication earth station through the man-machine dialogue interface

(4) Price advantage.

Compared with other types such as “On the Move antenna” and “Vehicle mounted SNG antenna”, portable satellite communication earth station is cheaper in terms of equipment itself and operation price. It is more suitable for deployment in areas with weak economic strength.

Regarding web page:
https://www.satsig.net/pointing/dish-pointing-angles-for-all-geo-satellites.htm

The final automated saving process to a local file on your device does not work on an iPad.

I have modified the web page page so that the output text table is all visible so you can highlight this text and then copy to clipboard and save somewhere.

Please tell me if successful !

Best regards, Eric     email: eric@satsig.net

1. Customer feedback of Antesky 5.3m earth station antenna
Customer ordered a set of 5.3-meter earth station antenna with C band circular polarization from Antesky for satellite communication. As one of our best-sell products, this 5.3m earth station antenna is in regular stock every year, so it is delivered quickly to customer site in Seychelles. After the customer received the goods, we remotely guided the customer on-site installation via video, and the entire installation process was very smooth. During the network connection test, the customer informed that there was stuck in the cross-polarization isolation due to something wrong with the previous installer. After final debugging, the cross-polarization isolation reached 40dB, far exceeding the 35dB required by eutelsat. Customers praise our professionalism and perfect after-sales service.



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After re-debugging by the customer engineer, the original feedback given to us is as follows:

# Tx carrier raised with mod -36 dBm and we got RX DMOD 2.4dB, no variation in RX signal level.

# We confirm it should be perfect and called to NOC and confirmed Cross pol isolation is OK and NOC remarked us tune antenna once again to peak signal.  (co pl 49 dB, cross pol 9 dB)

Below is the installed antenna sent by the customer for reference.

2. Earth station antenna polarization isolation operation

As we all know that after the antenna installation and debugging is completed, the next step is to test the antenna’s network access. This step is also extremely important. The most critical of these is the test of cross-polarization isolation. If the cross-polarization isolation is low, the satellite company cannot pass and will not be able to access the network.

For earth station antennas, polarization isolation is one of the important indicators to detect satellite access to the network. Once the system indicators are finely tuned by the antenna manufacturer, the performance is relatively fixed. This measurement generally requires the cooperation of the satellite operating company, so When a station encounters a situation such as satellite switching, it can contact the satellite company to send a single carrier signal on a frequency band that does not have anti-polarization services. The satellite company will use its reference antenna to assist users in debugging the antenna polarization angle. According to the principle of transceiver reciprocity, usually the best polarization angle for uplink polarization isolation is also the best polarization angle for downlink polarization isolation. The area where the customer is located needs to have a cross-polarization isolation of more than 35dB when connecting to the network according to eutelsat requirements.

The measurement of polarization isolation index can be completed by testing the antenna pattern with a spectrum analyzer. The basic method of using a spectrum analyzer to test the antenna pattern is to transmit a single carrier (CW) from the uplink station antenna, set the SPAN parameter of the spectrum analyzer to 0, set the scanning time according to the antenna rotation time, and then align and rotate the antenna according to the instructions. ,At the same time, a spectrum analyzer is used to record the changes in signal level during the rotation of the antenna. According to the rotation speed of the antenna, the time in the recording result is converted into an angle to obtain the antenna pattern.

In the process of verifying the network access of satellites by earth station antennas, cross polarization isolation is a very important indicator. If the cross polarization isolation indicator does not meet the standard, not only will the transmission signal in the positive polarization direction be polarized attenuated, but its reverse polarity will also be attenuated. Polarization leakage signals will interfere with services on the reverse polarization band. For the receive only antenna, the polarization isolation index is unqualified. While receiving the positive polarization service, the antenna will receive a strong reverse polarization service signal, causing interference to the positive polarization reception signal and affecting the quality of the receiving service. Therefore, whether it is an earth station VSAT antenna or a receive only antenna, precise adjustment of polarization isolation is very important and necessary.

We hope this article will be helpful to you in antenna debugging.

With the emergence of commercial aerospace and the development of 5G technology, the satellite frequency resources requirements and data transmission bandwidth and speed have become increasingly important. In this time, X band can meet to meet new requirements of higher wireless communication frequency bands for satellite operators.

1.1 Introduction and application of X band
X-band refers to the frequency band operating in the 7-12 GHz range. X-band has the advantages of high signal-to-noise ratio, low power consumption and high anti-interference capability. Its applications mainly include:

*Radar Systems: X band is extensively used in radar systems for various purposes such as weather monitoring, air traffic control, maritime surveillance, and military applications. Its shorter wavelength allows for better resolution and accuracy in target detection and tracking.
*Satellite Communications: X band is utilized for satellite communications, including satellite broadcasting, satellite internet services, and military satellite communications. Its relatively high frequency enables higher data transfer rates compared to lower frequency bands.


*Remote Sensing: X band is employed in remote sensing applications such as environmental monitoring, agriculture, forestry, and geological surveys. Its ability to penetrate through foliage and clouds makes it suitable for certain remote sensing applications.
*Navigation Systems: X band is used in various navigation systems, including marine and aviation radar systems, as well as in GPS augmentation systems for improved accuracy.
*Scientific Research: X band is utilized in scientific research applications such as radio astronomy for studying celestial objects and phenomena.
*Military Applications: X band is extensively used in military applications for radar systems, communication, electronic warfare, and missile guidance systems due to its ability to provide high-resolution imaging and target discrimination.
Overall, the X band’s characteristics make it suitable for a wide range of applications that require high resolution, accuracy, and data transfer rates.

This January, customer ordered 1 set of 1.2m automatic flyaway antenna with X band (Rx.: 7.25～7.75GHz; Tx.: 7.9～8.4GHz) from Antesky. And we’d tested and debugged in our factory. Below we will show you further detailed introduction about this antenna.

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1.2 Product characteristics of 1.2m automatic flyaway antenna with X band

a) Convenient operation, stable structure, rapid satellite search time, and high security;

b) Carbon fiber composite materials reflector is formed with at one time, with high accuracy, high strength, light weight, and easy disassembly;

c) Three legs tripod with high wading depth and strong wind resistance;

d) Modular design for easy maintenance and function expansion

1.3 Composition of 1.2m automatic flyaway antenna with X band

Schematic diagram of 1.2m automatic flyaway antenna with X band structure

1.2m automatic flyaway antenna& pedestal system display
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Antesky 1.2m automatic flyaway antenna hand held phone controller

X band feed system of 1.2m automatic flyaway antenna with X band
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1.3 Test radiation patterns of 1.2m automatic flyaway antenna with X band

As we mentioned our 1.2m X band automatic flyaway antenna is with highly electrical performance. You can check the below patterns further.

Radiation pattern@8.1GHz
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Radiation pattern@7.5GHz
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The 1.2-meter flyaway antenna is one of our advantageous products, including manual and automatic drive modes. For details, please click on the product page. As the new trend band in the satellite communication industry, we are also committed to further research on X-band. Among them, we have now developed the latest C/KU/X integrated OMT system for fixed station antennas. Please click to learn more.

We believe you learn something useful from above brief introduction of X band and our 1.2m automatic flyaway antenna with X band. Welcome to inquiry us if you are looking for such high quality antenna with the best price.

thank you for your comment. we will tell client and in our manual will focus on worker safety much.

I have added changed the web page so that satellites with elevation angles less than 5 deg or inclinations in excess of 0.6 deg are not shown.  You may override these options.

The satellite inclination is also included in the output file. like this:



I hope someone can try testing the page to see if it works. There are problems both with setting the site location (latitude and longitude) and with downloading the text file with the table of satellites and look angles. Much depends on your device operating system and browser and security settings.

Please tell me what works, and what doesn't !

Best regards, Eric

They are nice pictures but I have had complaint that the people should be wearing hard hats. When lifting antennas items like loose tools, nuts, bolts, washers etc do fall down and cause injury.

Please emphasis safety to your workers.

Best regards, Eric

I have spent the last week writing a new web page that will use your site location and work out the dish pointing angles for all visible geo satellite above 5 deg elevation angle.

See: https://www.satsig.net/pointing/dish-pointing-angles-for-all-geo-satellites.htm



I would welcome comments. Does it work for you ? Are the results correct ? Any ideas for improvements ?

Best regards, Eric

Previously, we mentioned that every year we will prepare regular stock for receive only antennas, flyaway antennas and VSAT antennas, so that we can arrange shipping to clients destination with the fastest delivery time. Here one of regular clients from Australia ordered 1 set of 3.7m TVRO antenna and 2 sets of 3.7m earth station antennas from Antesky in last November and we shipped out this 3 sets of antennas in early December 2021.

In July, client firstly finished installation on their site and told us antenna operate well now. They shared with us various photos which were taken during their installation. You can clearly see that our TVRO antenna structure including foundation part, kingpost part, reflector part and feed system, which makes our antenna can be assembled easily and quickly based on provided detailed installation manual. Installation guide service by engineer remotely is available as well.

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Hoisting reflector of 3.7m TVRO antenna to kingpost by crane
The reflector is supported by a galvanized steel kingpost that provides the required stiffness for pointing and tracking accuracy, and it can be installed on the ground or rooftop. Foundation as a kind of necessary part, it is important for all antenna system performance. Generally, client is tend to cement pouring foundation for fixed site installation. Due to some instructions, we also have non- penetrating foundation(NPM) for options, which can resist high wind as pouring foundation and can be moveable to another site if necessary.

3.7m TVRO antenna reflector with kingpost
Also, the reflector manufactured with high quality aluminum and steel materials, is with high rigidity. The antenna reflectors can bear two persons to stand on, so the installers can stand on the antenna reflectors without any worry during installation and debugging. Even the antenna performance can not be affected. Here you can see that client are installing antenna feed with standing on reflector.

Install feed of 3.7m TVRO antenna

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3.7m TVRO antenna installation finished

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Rear view of 3.7m TVRO antenna