An antenna, comprising: a feed network including a feed board that has a ground plane; a first-band radiating element configured to operate in a first frequency band, the first-band radiating element comprising: first and second crossed balun-fed dipoles (502, 504); first and second printed circuit boards (600, 601), each of the first and second printed circuit boards including: a first surface including a first feed line connected to the feed network of the feed board; a second surface opposite the first surface, the second surface including: one or more first conductive planes (704, 706) connected to the ground plane of the feed board, the one or more conductive planes capacitively coupled to the first feed line; and one or more first open-end traces coupled to the one or more first conductive planes, two sub-arrays of second-band radiating elements wherein each of the second-band radiating elements is configured to operate in a second frequency band wherein the first-band radiating element is positioned spatially between the two sub-arrays of second-band radiating elements, and wherein each of the one or more first open-end traces has a length that is a quarter wavelength of a wavelength corresponding to the second frequency band. a feed network including a feed board that has a ground plane; a first-band radiating element configured to operate in a first frequency band, the first-band radiating element comprising: first and second crossed balun-fed dipoles (502, 504); first and second printed circuit boards (600, 601), each of the first and second printed circuit boards including: a first surface including a first feed line connected to the feed network of the feed board; a second surface opposite the first surface, the second surface including: one or more first conductive planes (704, 706) connected to the ground plane of the feed board, the one or more conductive planes capacitively coupled to the first feed line; and one or more first open-end traces coupled to the one or more first conductive planes, two sub-arrays of second-band radiating elements wherein each of the second-band radiating elements is configured to operate in a second frequency band wherein the first-band radiating element is positioned spatially between the two sub-arrays of second-band radiating elements, and first and second crossed balun-fed dipoles (502, 504); first and second printed circuit boards (600, 601), each of the first and second printed circuit boards including: a first surface including a first feed line connected to the feed network of the feed board; a second surface opposite the first surface, the second surface including: one or more first conductive planes (704, 706) connected to the ground plane of the feed board, the one or more conductive planes capacitively coupled to the first feed line; and one or more first open-end traces coupled to the one or more first conductive planes, two sub-arrays of second-band radiating elements wherein each of the second-band radiating elements is configured to operate in a second frequency band wherein the first-band radiating element is positioned spatially between the two sub-arrays of second-band radiating elements, and a first surface including a first feed line connected to the feed network of the feed board; a second surface opposite the first surface, the second surface including: one or more first conductive planes (704, 706) connected to the ground plane of the feed board, the one or more conductive planes capacitively coupled to the first feed line; and one or more first open-end traces coupled to the one or more first conductive planes, two sub-arrays of second-band radiating elements wherein each of the second-band radiating elements is configured to operate in a second frequency band wherein the first-band radiating element is positioned spatially between the two sub-arrays of second-band radiating elements, and one or more first conductive planes (704, 706) connected to the ground plane of the feed board, the one or more conductive planes capacitively coupled to the first feed line; and one or more first open-end traces coupled to the one or more first conductive planes, two sub-arrays of second-band radiating elements wherein each of the second-band radiating elements is configured to operate in a second frequency band wherein the first-band radiating element is positioned spatially between the two sub-arrays of second-band radiating elements, and wherein each of the one or more first open-end traces has a length that is a quarter wavelength of a wavelength corresponding to the second frequency band.