Table 1.

A comparative analysis of DCL-based filtering cables against other microwave devices.

References	Name	Typical structure	Characterization
This paper 13	DCL-based filtering cable		DCL-based filtering cable can be manufactured by wrapping a specific FPCB around an inner conductor. Shielding, armor, and grounding can also be applied outside as in a traditional cable. It is an efficient and complex electromagnetic environment solution that integrates filtering, shielding, and grounding. The most important feature is the distributed filtering function along the length of the cable
14	Shielding cable		Cables with a shielding layer can achieve electromagnetic shielding performance, but they do not have a filtering function
15	Coaxial cable		Invented by Oliver Heaviside, coaxial cables provide stable impedance and phase in a broad frequency band and have good signal integrity, but they do not have a filtering function
16	Twisted-wire pair		A pair of mutually insulated wires is twisted together to transfer differential mode signals and eliminate common mode interference
17	Flexible microstrip-filtered transmission line		The flexible microstrip-filtered transmission line is made of FPCB, which is very thin and light, and has filtering capabilities. It can replace traditional coaxial lines and be conveniently used for mobile or flexible communication terminals
18	Suspension filter circuit		The filtering function is achieved by adding capacitors and wires to the silicon rubber pad, which can be installed in the connectors. However, the filtering performance is weak and the reliability is not very high
19	Filtering connector		Filtering connectors can be achieved by adding capacitors and inductors inside the connector, which is a type of lumped filter rather than a distributed filter
20	Ferrite magnetic ring		Passing the cable through the magnetic ring can suppress high frequency interference on the cable. However, the disadvantage is that it is heavier and cannot be bent easily
21	Passive Power filter		The passive EMI power filter is composed of capacitors, inductors, and resistors. It has the advantage of being high-reliability and effective in solving EMI problems in the low frequency band. However, its disadvantage is that it has a large volume and heavy weight
22	Waveguide filter		Metal cavity filters have a very low insertion loss and high quality factor. However, their disadvantages are their large size, bulky nature, and high cost
23,24	Low-temperature co-fired ceramic (LTCC) filter		LTCC multilayer filters, commonly used in mobile communication terminals, have the advantage of being extremely small in size. However, their disadvantage is that they have a low quality factor and high insertion loss in the passband
25	Defected ground structure filter		Defected ground structure filters consist of a transmission line on one side of the substrate and a ground with a specific etching pattern on the other side of the substrate. This configuration can be equivalent to a filter circuit