Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phased Array With Improved Beamforming Capability via Use of Double
  Phase Shifters   The passive electronically scanned array (PESA) is widely used due to its
simple structure and low cost. {Its antenna weights have unit modulus and thus,
only the weights phases can be controlled. PESA has limited degrees of freedom
for beampattern design, where only the direction of the main beam can be
controlled.} In this paper we propose a novel way to improve the beamforming
capability of PESA by endowing it with more degrees of freedom via the use of
double phase shifters (DPS). By doing so, both the magnitude and the phase of
the antenna weights can be controlled, allowing for more flexibility in
beampattern design. We also take into account the physical resolution
limitation of phase shifters, and propose a method to approximate a given
complex beamformer using DPS. Simulation results indicate significant
beamforming improvement even at low phase resolution.

35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con