Antenna system with low-pass filter

A system (700) comprising:

• two antenna systems comprising:
• a first antenna system comprising:
• a first dual-polarized radiating element extending generally in a first direction parallel or substantially parallel to a first reflector of the first antenna system, wherein the first dual-polarized radiating element is configured to emit an electromagnetic wave;
• a first low-pass filter structure extending generally in a second direction perpendicular or substantially perpendicular to the first reflector of the first antenna system, wherein the first low-pass filter structure is spaced apart, in relation to the first direction, from a center portion of the first dual-polarized radiating element;
• and
• a first coupling feeding line which electrically couples, via a region which comprises an end portion of the first dual-polarized radiating element, the first low-pass filter structure with the center portion of the first dual-polarized radiating element for feeding an electrical signal via the first low-pass filter structure through the first coupling feeding line to the center portion of the first dual-polarized radiating element;
• and
• a second antenna system comprising:
• a second dual-polarized radiating element extending generally in the first direction parallel or substantially parallel to a second reflector of the second antenna system, wherein the second dual-polarized radiating element is configured to emit an electromagnetic wave;
• a second low-pass filter structure extending generally in the second direction perpendicular or substantially perpendicular to the second reflector of the second antenna system, wherein the second low-pass filter structure is spaced apart, in relation to the first direction, from a center portion of the second dual-polarized radiating element;
• and
• a second coupling feeding line which electrically couples, via a region which comprises an end portion of the second dual-polarized radiating element, the second low-pass filter structure with the center portion of the second dual-polarized radiating element for feeding an electrical signal via the second low-pass filter structure through the second coupling feeding line to the center portion of the second dual-polarized radiating element;
• and
• a decoupling device, in particular a parasitic loop, extending generally in the second direction and arranged between the first dual-polarized radiating element of the first antenna system and the second dual-polarized radiating element of the second antenna system.

A system (comprising:

• two antenna systems comprising:
• a first antenna system comprising:
• a first dual-polarized radiating element extending generally in a first direction parallel or substantially parallel to a reflector of the first antenna system, wherein the first dual-polarized radiating element is configured to emit an electromagnetic wave;
• a first low-pass filter structure extending generally in a second direction perpendicular or substantially perpendicular to the reflector of the first antenna system, wherein the first low-pass filter structure is spaced apart, in relation to the first direction, from a center portion of the first dual-polarized radiating element;
• and
• a first coupling feeding line which electrically couples, via a region which comprises an end portion of the first dual-polarized radiating element, the first low-pass filter structure with the center portion of the first dual-polarized radiating element for feeding an electrical signal via the first low-pass filter structure through the first coupling feeding line to the center portion of the first dual-polarized radiating element;
• and
• a second antenna system comprising:
• a second dual-polarized radiating element extending generally in the first direction parallel or substantially parallel to a reflector of the second antenna system, wherein the second dual-polarized radiating element is configured to emit an electromagnetic wave;
• a second low-pass filter structure extending generally in the second direction perpendicular or substantially perpendicular to the reflector of the second antenna system, wherein the second low-pass filter structure is spaced apart, in relation to the first direction, from a center portion of the second dual-polarized radiating element;
• and
• a second coupling feeding line which electrically couples, via a region which comprises an end portion of the second dual-polarized radiating element, the second low-pass filter structure with the center portion of the second dual-polarized radiating element for feeding an electrical signal via the second low-pass filter structure through the second coupling feeding line to the center portion of the second dual-polarized radiating element;
• and
• one or more second radiating elements arranged, in relation to the second direction, at least partially between the reflector of the first and second antenna systems system and the dual-polarized radiating element, wherein the one or more second radiating elements are configured to emit electromagnetic waves having frequencies which are higher than a frequency of the electromagnetic wave emittable by the dual-polarized radiating element.