Section 01
The Air Interface
What happens between antenna and antenna. Everything that happens between the antenna connector and the first packet the network recognises.
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01.1
What Actually Travels Between a Handset and a MastOne transmission, end to end — power out, path loss, noise, and what arrives.
By Spectrum Notes
7 min read -
01.2
Modulation, PlainlyHow information is written onto a carrier, and why the scheme matters.
By Spectrum Notes
4 min read -
01.3
What an Antenna Is DoingGain, pattern and polarisation without the mathematics.
By Spectrum Notes
4 min read -
01.4
Noise, Interference and the FloorWhy the limit is rarely power and usually noise.
By Spectrum Notes
2 min read
From the same section
4 explainers filed here
The Air Interface
What Actually Travels Between a Handset and a Mast
One transmission, end to end — power out, path loss, noise, and what arrives.
The Air Interface
Modulation, Plainly
How information is written onto a carrier, and why the scheme matters.
The Air Interface
What an Antenna Is Doing
Gain, pattern and polarisation without the mathematics.
The Air Interface
Noise, Interference and the Floor
Why the limit is rarely power and usually noise.
Other sections
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02
Standards & Generations
Who writes the rules and what changed when.
- What Each Generation Actually Changed
- The Protocol Stack, Layer by Layer
- How a Standard Gets Written
Critical Communications
Networks built to work on the worst day.
- Why Critical Networks Are Built Differently
- Push-to-Talk and Group Calls
- Designing for the Bad Day
Spectrum & Networks
Dividing the airwaves and covering ground.
- How Spectrum Gets Divided
- Why Physics Changes With Frequency
- Cells, Reuse and Handover
Devices & Deployment
The terminal and the site.
- What Is Inside the Terminal
- Putting a Network on the Ground