A horizontally-polarized omnidirectional antenna, comprising:
- a body comprising:
- a host printed circuit board (PCB) comprising:
- a plurality of host slots;
- a metal-flooded ground plane;
- a plurality of windows in the metal-flooded ground plane, respectively corresponding to the plurality of host slots;
- an interconnect configured to convey a radio frequency (RF) signal at characteristic impedance Z0;
- and
- a common port configured to receive the RF signal and split off into first and second 2*Z0 transmission lines to form an equal power division at a first power split, each of the first and second 2*Z0 transmission lines being configured to step into Z01/2 at a second power split using a multi-section transformer comprising a 0.5√(2)*Zhigh line and a first Z0 line, the first Z0 line dividing power at the second power split to form a Zhigh line and a second Z0 line at a chamfer, the Zhigh line extending from an antenna taper location that is more than halfway down the chamfer from the second power split, the Zhigh line stepping into a third Z0 line using a 2*Z0 transformer, where Zhigh is at least 2.25*Z0;
- a plurality of antenna elements, each corresponding to a respective one of the plurality of host slots and a respective window corresponding to the respective host slot of the host PCB, each of the plurality of antenna elements comprising:
- an antenna PCB, the antenna PCB including an antenna slot having a pullback region such that the host PCB is inserted into the antenna PCB in the antenna slot, the antenna PCB is inserted into the host PCB in the corresponding host slot, the corresponding window is in the antenna slot, and the pullback region being spaced apart from the host PCB;
- a first plurality of conducting strips at an outer periphery of a top side of the antenna PCB in a loop pattern;
- a second plurality of conducting strips at an outer periphery of a bottom side of the antenna PCB in a loop pattern, such that ends of each of the second plurality of conducting strips slightly overlap ends of each of the first plurality of conducting strips to form a plurality of capacitive elements at overlap regions;
- a pair of input conducting strips respectively connected to an opposing pair of the first plurality of conducting strips on the top side of the antenna PCB;
- a first shunt stub crossing the pair of input conducting strips on the top side of the antenna PCB;
- a pair of input connection solder joints at respective ends of the pair of input conducting strips near a center of the antenna PCB on the top side of the antenna PCB, the input connection solder joints being on opposite sides of the corresponding window of the host PCB;
- a first compensation strip extending from one of the first plurality of conducting strips adjacent to pullback region of the antenna slot on the top side of the antenna PCB;
- a transmission feed connection solder joint connected directly between the pair of input connection solder joints across the respective window;
- a pair of ground conducting strips respectively connected to an opposing pair of the second plurality of conducting strips on the bottom side of the antenna PCB;
- a second shunt stub crossing the pair of input conducting strips on the bottom side of the antenna PCB;
- a pair of ground connection solder joints at respective ends of the pair of ground conducting strips near a center of the antenna PCB on the bottom side of the antenna PCB, the ground connection solder joints being on opposite sides of the corresponding window of the host PCB;
- a ground return connection solder joint connected directly between the pair of ground connection solder joints across the respective window;
- and
- a second compensation strip extending from one of the second plurality of conducting strips adjacent to the antenna slot opposite to the pullback region of the antenna slot on the bottom side of the antenna PCB;
- and
- an RF connector coupled to one end of the body to receive a power supply for the antenna,
- wherein each of the second and third Z0 lines of each of the first and second 2*Z0 transmission lines is connected to a corresponding transmission feed connection solder joint of a corresponding antenna element.