[Python] How to plot a sawtooth chirp waveform using an array of frequency and time for an...

Before switching to use sawtooth I was using sine wave but in sine wave high frequency content was not clearly visible, But I don't have any experience with using sawtooth waveforms. I am going to make a custom block from this code in GNU Radio so I won't be able to use scipy.signal.sawtooth or signal.chirp. as some libraries don't work in GNU radio.

import numpy as np
import matplotlib.pyplot as plt
from math import pi

chirp_duration = 60e-6
f0 = 1e6
f1 = 3e6
no_samp = 1001
rcs = 0.0377

f_step = (f1-f0)/no_samp
rf_axis = np.linspace(f0, f1, int(f_step))
rt_axis = np.linspace(0, chirp_duration, int(f_step))

# rchirp = np.cos(2 * np.pi * rf_axis * rt_axis)

plt.figure(figsize=(12, 3))
plt.xlabel("Time")
plt.ylabel("Frequency")
plt.title('Received Chirp')
plt.plot(rt_axis, rf_axis)
plt.show()


This is the code I was using to generate the chirp signal in sine wave. This code works perfectly for low frequency values of f0 and f1.

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