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Added TF polar plot

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This commit is contained in:
Luke 2018-07-17 19:24:14 -07:00
parent 2b3686548e
commit 855e35367d
1 changed files with 6 additions and 3 deletions
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9
tankPlot.py
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@ -15,11 +15,11 @@ from smithplot import SmithAxes
#####
f0 = 28
bw0 = 6.5 # assumed tuning range (GHz)
bw_plt = 0.5 # Plotting range (GHz)
bw_plt = 1 # Plotting range (GHz)
fbw = bw0/f0 # fractional bandwidth
frequency_sweep_steps = 101
gamma_sweep_steps = 11
gamma_sweep_steps = 15
gamma = 1 - np.power(f0 / (f0 + bw0/2),2)
gamma_limit_ratio = 0.99 # how close gamma can get to theoretical extreme
@ -80,7 +80,8 @@ def ang(volt_tf):
#y_tank=np.zeros((len(delta),len(gamma_swp)))
h = pp.figure()
mgr = pp.get_current_fig_manager()
ax1 = h.add_subplot(2,2,(1,3), projection='smith')
ax1 = h.add_subplot(2,2,1, projection='smith')
ax2 = h.add_subplot(2,2,3, projection='polar')
ax3 = h.add_subplot(2,2,2)
ax4 = h.add_subplot(2,2,4)
for itune,gamma_tune in enumerate(gamma_swp):
@ -93,11 +94,13 @@ for itune,gamma_tune in enumerate(gamma_swp):
tf = gm1 / g1_tune * \
1j*(1+delta) / \
( 1j*(1+delta) + K*(1 - (1+gamma_tune)*np.power(1+delta,2)) )
ax2.plot(np.angle(tf), db(tf))
ax3.plot(f,db(tf))
ax4.plot(f,ang(tf))
################################################################################
ax1.set_title('Tank Impedance')
ax2.set_title('Transfer Function')
ax3.set_title('TF Gain')
ax3.set_ylabel('Gain (dB)')