satellite – Oleg Kutkov personal blog

Small satellite dish with rotator

Oleg Kutkov — Thu, 11 Feb 2021 00:13:15 +0000

Receiving and analyzing radio signals is fun. Receiving satellite signal is even better. A few years ago, I had a nice 3m satellite dish with a hydrogen line receiver. Now I have only a small balcony with limited antennas placement ability. I decided to build a custom 40 cm dish with a servo-based rotator. Sure, it’s impossible to receive weak…

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Satellite LNB controller with GUI interface

Oleg Kutkov — Tue, 15 Dec 2020 00:54:15 +0000

Satellite LNB are quite cheap and easy to get devices. There are different models for different bands (C, Ku, and Ka) with different characteristics like SNR, noise figure, etc. Typically those devices are used with TV Set-top boxes. More interesting is that LNB can be easily connected to an SDR receiver. LNB is a simple frequency down-converter with an output…

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Mysterious Flat satellite antenna from China

Oleg Kutkov — Tue, 22 Sep 2020 00:41:00 +0000

A few months ago, I found a quite unusual satellite antenna on the well-known Chinese portal. The antenna was relatively small, completely flat, and declared as a Ku-band satellite TV antenna. I was really wondered what’s inside and how it works so I decided to buy one sample. In a few weeks, I got a shabby box containing an actual…

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Reworking linear polarization satellite LNB into a circular polarized

Oleg Kutkov — Sun, 20 Sep 2020 20:56:08 +0000

In this article, I want to discuss different types of satellite LNB, polarization, and depolarization of waves. Also, I’ll show how to rework the LNB. Also, we will discuss a theory to figure out why this rework is working. The primary topic here is Ku-band LNB, but all this also works for the Ka-band and C-band. Here in Europe, we…

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