Publication number: 20200411988
Filed: Jun 24, 2020
Publication Date: Dec 31, 2020
Applicant: NOKIA SOLUTIONS AND NETWORKS OY (Espoo)
Inventors: Dimitry KOZLOV (Dublin), Senad BULJA (Dublin), Jack MILLIST (Carcassonne)
Application Number: 16/910,299
Abstract: The basic idea of the present invention submission lies with the modification of a lens antenna Beam-Forming Network (BFN) by dividing the feeding elements into two separate groups and simultaneous excitation of two elements – one from each group. This should be done in the way that any element of the first and second groups can be chosen independently at any instant. This can be achieved by using two independent switching networks connected to the feeding elements (Fig. 1). As one can see, such a BFN allows us to create N2/4 different radiation patterns (RP) by a sequential combination of N/2 elements from the first group and N/2 elements from the second one. It is obvious that N2/4 > N if N>4 and this difference quadratically increases as a function of N. Alternatively, if the directions of the potentially created beams are fixed, the number of feeding elements can be reduced.
The proposed approach is based on the fact that a radiation pattern (RP) of a lens antenna, created by a simultaneous activation of two individual feeding elements represents a superposition of two individual RPs, created by independent excitation of these elements. Thus, the direction of the beam is defined by spatial coordinates of both feeding elements.