Adding script for creating HDF data products for calibration

create_hdf_data.py

@@ -0,0 +1,101 @@
+from leda_cal.analog import *
+
+def interp_cplx(x_new, x_orig, d_orig):
+    re = np.interp(x_new, x_orig, np.real(d_orig))
+    im = np.interp(x_new, x_orig, np.imag(d_orig))
+    d_new = re + 1j * im
+    return d_new
+
+def s2p_interp(f_leda, ant_s11_file, lna_s11_file):
+
+    ant = AnalogComponent()
+    lna = AnalogComponent()
+    ant.read_s2p(ant_s11_file)
+    lna.read_s2p(lna_s11_file)
+
+    f  = ant.freq * 1e3
+    ra = ant.s11
+    rl = lna.s11
+
+    ra_ = interp_cplx(f_leda, f, ra)
+    rl_ = interp_cplx(f_leda, f, rl)
+
+    return ra_, rl_
+
+
+f_leda = np.linspace(0, 98.304, 4096)
+i0 = closest(f_leda, 30)
+i1 = closest(f_leda, 85)
+f_leda = f_leda[i0:i1]
+
+
+##################
+## ANT + LNA
+##################
+
+a252x_s11 = s2p_interp(f_leda, 'field-data/field-jan-13/vna-ant252-a2-s11-3.s2p',
+           'fee-vna/dcp-a2-s11.s2p')
+
+a254x_s11 = s2p_interp(f_leda, 'field-data/field-jan-13/vna-ant254-c2-s11.s2p',
+           'fee-vna/dcp-c2-s11.s2p')
+
+a255x_s11 = s2p_interp(f_leda, 'field-data/field-jan-13/vna-ant255-d2-s11.s2p',
+           'fee-vna/dcp-d2-s11.s2p')
+
+a252y_s11 = s2p_interp(f_leda, 'field-data/field-jan-13/vna-ant252-a2-s11-3.s2p',
+           'fee-vna/dcp-a2-s11.s2p')
+
+a254y_s11 = s2p_interp(f_leda, 'field-data/field-jan-13/vna-ant254-c2-s11.s2p',
+           'fee-vna/dcp-c2-s11.s2p')
+
+a255y_s11 = s2p_interp(f_leda, 'field-data/field-jan-13/vna-ant255-d2-s11.s2p',
+           'fee-vna/dcp-d2-s11.s2p')
+
+
+
+ant_s11_dict = {
+    'f'    : f_leda,
+    'a252x': {'ra': a252x_s11[0], 'rl': a252x_s11[1]},
+    'a252y': {'ra': a252y_s11[0], 'rl': a252y_s11[1]},
+    'a254x': {'ra': a254x_s11[0], 'rl': a254x_s11[1]},
+    'a254y': {'ra': a254y_s11[0], 'rl': a254y_s11[1]},
+    'a255x': {'ra': a255x_s11[0], 'rl': a255x_s11[1]},
+    'a255y': {'ra': a255y_s11[0], 'rl': a255y_s11[1]},
+    }
+
+hkl.dump(ant_s11_dict, 'cal_data/vna_calibration.hkl')
+
+
+###########
+## BALUN
+###########
+import skrf as rf
+
+balun = rf.Network()
+balun.read_touchstone('component-data/ADT4-6T___Plus25degC.S3P')
+ff  = balun.frequency.f / 1e6
+s12 = balun.s12.s_db[:, 0,0]
+s13 = balun.s13.s_db[:, 0,0]
+
+L = 20*np.log10( 10**(s12/20.0) + 10**(s13/20.0) )
+
+plt.plot(ff, L)
+plt.xlim(20, 90)
+plt.ylim(-1, -0.5)
+plt.xlabel("Frequency [MHz]")
+plt.ylabel("Balun loss [dB]")
+hkl.dump({'f': ff, 'L' : L}, 'cal_data/balun_loss_single.hkl')
+
+L_interp = np.interp(f_leda, ff, L)
+
+balun_loss_dict = {
+    'f'    : f_leda,
+    'a252x': L_interp,
+    'a252y': L_interp,
+    'a254x': L_interp,
+    'a254y': L_interp,
+    'a255x': L_interp,
+    'a255y': L_interp,
+    }
+
+hkl.dump(balun_loss_dict, 'cal_data/balun_loss.hkl')