Complete an Electronic Circuit for a Resonant Schematic

The project to complete it is a Resonant circuit that needs the PCB Schematic to be completed ready as a Gerber file to send away to have the PCB manufactured and populated, the part where it needs special input is the part of the circuit that will have a Microcontroller that can be used to keep the frequency very stable so that the resonance is always controlled and does not vary as the resonance is critical for its application. The exact resonant frequency is non critical but exact resonance at whatever frequency the inductor capacitor combination happens to be. It will be between 12 - 13 KHz the frequency of the coils excitation can be changed in very small increments to do two things. 1:- automatically via software, find the resonant frequency of the coil capacitor combo, and 2:- slowly follow the resonant frequency as temperature drifts due to both ambient changes and the heating caused by changes due to the very high coil current and voltage across the tuned circuit. This process of course must be much slower than the relatively fast changes that a target would cause. Then when the Resonant PCB schematic has been completed it will need to be *******fully tested in a simulation program.******** Please ask all questions and queries before you start on the project. I will attached a copy of the original schematic for you to use as a guide. '' There is one thing which will need sorting in software which will I think be easy. The resonant frequency changes slightly during operation. This is likely due to heating effects in both the coil and its tuning capacitors. If not corrected for the readings from the detector will be all over the place. As the coil must remain exactly resonant at all times to avoid undesirable phase shift and distorted readings from the target material. To compensate for the change in resonant frequency, several steps will be taken, and these include breaking up the resonating capacitor to several smaller ones and the use of higher quality types such as polypropylene. This should minimise but not eliminate the problem. We will also need a Microproccessor /Direct Digital Synthesiser (DDS), or a fractional N Synthesiser. These are available for HF use and could be divided down to approximately 52 kHz. There is a solution I have seen others use and that is to use a Microprocessor. This would be a cheaper option as well. Can you design a synthesiser? It would need a resolution of 0.1 Hz, with 0.01 Hz being preferable. it can be smaller than even that if possible. This DDS will be part of a phase locked loop. The loop will initially find the resonant frequency by the use of a phase detector, which could be on the processor chip if it is a FPGA or CPLD The phase detector will compare the phase of the receive oscillator to that of a signal coming back from the coil. The phase angle (whatever it is at resonance) will be used to lock the system and as the resonant frequency slowly changes due to the temperature, the DDS frequency will also change to keep up. The change will need to be slow so as to avoid "locking" suddenly to a target.'' The Schematic supplied without the Microproccessor/DDS has been built and is correct and works without it. We will supply you with a copy of the Original Schematic as a PDF file so you can see what has to be completed. Your Schematic will be assessed by our Electronics Team before payment is made. What needs to be done on the Resonant Schematic.
1)The MPP resonating capacitor needs to be divided into several smaller MPP caps to control heat
2)The Resonant Schematic needs to be designed with a Microcontroller/ DDS in it to control the Resonant Frequency so that it remains stable , the code for the Microcontroller will need to be supplied if possible.
3)The Resonant Schematic has to be supplied as a Schematic File and a PCB file with a Gerber File