Abstract: In recent years, multimode antenna and unconventional antenna arrays have become research hotspots in antenna technology, under the driven of emerging communication technology and military technology. Such antennas include various new types of antennas which use the feeding networks with complex weight, such as multimode antenna, virtual array antenna with continuously moving phase center, and element level pattern diversity antenna array. They all have important application prospects. However, the current solution to the feeding network with complex weight is to add phase shifter and variable gain amplifier to each branch. They are constructed in active circuit, or even active system, having the disadvantages of complicated structure, high cost, and large power consumption. Therefore, research on passive complex weight feeding networks with simple structure, low cost, and low power consumption, especially on electrically controlled passive complex weight feeding network, has important theoretical significance and application value. This article proposes several new ideas in this regard.