1. An Active Electronically Scanned Array, AESA (100) comprising
- at least one planar Printed Circuit Board, PCB (102),
- a first set of first notch antenna elements (104) arranged on the PCB (102), and
5 - a second set of second antenna elements (106);
wherein the first and second antenna elements (104 106) are interleaved,
wherein each first antenna element (104) is configured to transmit and/or receive, a
signal having a first direction of polarization, and
wherein each second antenna element (106) is configured to transmit and/or receive, a
10 signal having a second direction of polarization, which is different from the first
direction of polarization,
characterized in that each second antenna element (106) is a notch antenna element
which is comprised in a surface mounted element (105) on the PCB (102), and wherein
the first direction of polarization and the second direction of polarization is separated by
15 at least 45°.
2. The AESA according to claim 1, wherein each first notch antenna elements (104) are
formed in at least one electrically conducting layer (102a) of the PCB (102).
20 3. The AESA (100) according to claim 1-2, wherein each surface mounted element (105),
is mounted on an electrically conducting layer (102a) of the PCB (102).
4. The AESA (100) according to any of preceding claims, wherein each surface mounted
element (105) has been mounted on an electrically conducting layer (102a) of the PCB
25 (102) using,
- soldering, and/or
- electrically conductive gluing.
5. The AESA (100) according to anyone of the preceding claims, wherein each surface
30 mounted element (105,405) comprises a conductive sheet (105a) comprising a first
planar part 105b in which the second antenna elements (106) is formed, wherein the
first planar part 105b is arranged angled at least 45° in relation to the PCB (102).
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6. The AESA (100) according to claim 5, wherein the conductive sheet comprises a
second planar part (105c) which is parallel to the PCB (102).
7. The AESA (100) according to claim 6 wherein each surface mounted element (105)
5 consists of the first part and the second part.
8. The AESA (100) according to anyone of the preceding claims, wherein the first
direction of polarization and the second direction of polarization are separated by at
least 85°, and are preferably essentially orthogonal to each other.
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9. The AESA (100) according to any of preceding claims, wherein each first antenna
element (104) and/or each second antenna element (106) is,
- a Tapered Slot Antenna, TSA , or
- a stepped notch antenna.
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10. The AESA (100) according to any of preceding claims, comprising a plurality of
transceiver modules, TRMs, (108) wherein each first antenna element (104) and each
second antenna element (106) is connected to a corresponding transceiver module,
TRM, (108).