RF Transmitter Circuit Design

I am in search of a knowledgeable individual to design an RF transmitter circuit compatible with the rx480e module at frequency 433MHz. Importantly, I need the transmitter circuit to be simple yet effective, with the capability to cover a long-range distance of at least 3km.

Key Aspects:
- Long-Range Communication: The transmitter circuit should be designed to work efficiently over long distances - a minimum of 3km.
- Simple Design: The design needs to be as straightforward as possible, without compromising functionality.
- Compatibility: The transmitter circuit must be compatible with the rx480e module.

The Purpose:
This RF transmitter circuit will be instrumental for a remote control system that is able to control a small relay and through that relay we can control a power circuit.

Ideal Candidate:

For a successful bid on this project, you should have:
- Proficient knowledge of RF circuit design.
- Proven experience in long-range communication technologies.
- Understanding of the rx480e module
- Prior experience in designing circuits for remote control systems.
Let me know how you can deliver these specifications, and let's get this project underway.