Certainly! Let's break down the steps:

Impedance from Return Loss:

The relation between the reflection coefficient (Γ) and return loss (RL) is given by:

RL=−20log 10∣Γ∣

Given RL = -6.3 dB, we can find ΓΓ using the equation above:

∣Γ∣=10−RL/20

∣Γ∣=10−(−6.3)/20

∣Γ∣≈0.498∣Γ∣≈0.498

The reflection coefficient in terms of impedance (Z) and characteristic impedance (Z_0, which is 50 ohms for CPW) is:

Γ=Z+Z0​/Z−Z0​​

Given ∣Γ∣, and Z_0 = 50 ohms, solve for Z:

Z=Z0​×1−∣Γ∣1+∣Γ∣​ Vrms≈50×1+0.4981−0.498Z≈50×1−0.4981+0.498​ Vrms≈149.4 ohmsZ≈149.4 ohms

Given V_pp = 53V (peak-to-peak), the RMS voltage is: Vrms​=22​Vpp​​ Vrms​=22​Vpp​​ ����≈5322Vrms​≈22​53​ ����≈18.75VVrms​≈18.75V

Then, plug this value into the power equation: �≈(18.75)22×149.4P≈2×149.4(18.75)2​ �≈1.176WP≈1.176W

The power of your RF device at 7.3 MHz is approximately 1.176 watts when connected to a 50-ohm load, given the return loss and voltage readings.

Here are some suggestions regarding voltage and power conversion in RF devices:

• Use a rectifier to convert the RF signal to DC. A rectifier is a device that converts alternating current (AC) to direct current (DC). There are many different types of rectifiers available, each with its own advantages and disadvantages. The best rectifier for a particular application will depend on the frequency and power of the RF signal, as well as the desired output voltage and current.
• Use a voltage regulator to stabilize the output voltage. A voltage regulator is a device that maintains a constant output voltage even when the input voltage fluctuates. This is important in RF devices to ensure that the components operate within their specified voltage ranges.
• Use a power converter to increase or decrease the output voltage. A power converter is a device that converts one form of electrical energy to another. There are many different types of power converters available, each with its own advantages and disadvantages. The best power converter for a particular application will depend on the desired output voltage, current, and efficiency.
• Consider the efficiency of the voltage and power conversion stages. The efficiency of a voltage or power conversion stage is the ratio of the output power to the input power. The higher the efficiency, the less power is wasted as heat. This is important in RF devices to conserve battery power and reduce heat dissipation.
• Use high-quality components. The quality of the components used in the voltage and power conversion stages will have a significant impact on the overall performance of the RF device. Using high-quality components will help to ensure that the device operates reliably and efficiently.

Here are some additional considerations for voltage and power conversion in RF devices:

• The frequency of the RF signal. The frequency of the RF signal will affect the type of rectifier and voltage regulator that can be used.
• The power of the RF signal. The power of the RF signal will affect the output voltage and current that the voltage regulator and power converter need to provide.
• The desired output voltage and current. The desired output voltage and current will affect the type of voltage regulator and power converter that can be used.
• The efficiency of the voltage and power conversion stages. The efficiency of the voltage and power conversion stages is important to conserve battery power and reduce heat dissipation.
• The cost of the voltage and power conversion stages. The cost of the voltage and power conversion stages is a factor to consider, especially in cost-sensitive applications.

thanks so much! Elmira, this is what I did it. just wanted to make 100% sure.