Patent attributes
A low-pass filter includes a first curved microstrip, a second curved microstrip, a first flat microstrip, a second flat microstrip, and a third flat microstrip. The first curved microstrip is in an n-shape and defines a first receiving space therein. The second curved microstrip is in an n-shape and defines a second receiving space therein. The first flat microstrip is received in the first receiving space and connected to a topside of the n shape of the first curved microstrip. The second flat microstrip is received in the first receiving space along with the first flat microstrip and connected to one end of the first curved microstrip. The third flat microstrip is received in the second receiving space and connected to one end of the second curved microstrip.
