Folder structure simplfied

mxpic/components/primitives/directional_couplers.py

@@ -4,7 +4,7 @@ import numpy as np
 from numpy import pi
 
 from ...routing import Route
-from ...structures import _my_polygon,circle,Clothoid
+from ..geometry import _my_polygon,circle,Clothoid
 from ...basic import __cell_arg__
 
 class ring_bus_wg:
@@ -853,10 +853,34 @@ class MDM(ADC_STD_2x2):
 
 
 class DC_bend :
-    '''
-    This is a class for bend directional coupler for broadband and fabrication tolerant power splitting. 
-    Written by HU GAOLEI at 2022.5.15. 
-    '''
+    """
+    This is a class for bend directional coupler for broadband and fabrication tolerant power splitting.
+    
+    Parameters
+    ----------
+    name : Any, optional
+        Unique identifier for the device cell. Default is None.
+    w_in : float, optional
+        Width parameter in microns. Default is 0.45.
+    w_out : float, optional
+        Width parameter in microns. Default is 0.45.
+    gap : float, optional
+        Spacing or gap parameter in microns. Default is 0.2.
+    r_in : int, optional
+        Radius parameter in microns. Default is 40.
+    theta_arc : int, optional
+        Angle parameter in degrees. Default is 30.
+    w_wg : float, optional
+        Width parameter in microns. Default is 0.45.
+    theta_ext : int, optional
+        Angle parameter in degrees. Default is 15.
+    xs_wg : str, optional
+        Layer or cross-section name used by the device. Default is 'strip'.
+    sharp_patch : bool, optional
+        Whether to add geometry patches for sharp corners or cladding continuity. Default is True.
+    show_pins : bool, optional
+        Whether to draw pin markers in the generated layout. Default is False.
+    """
 
     """
         Bend-based directional coupler for broadband, fabrication-tolerant splitting.