针对阵元幅相误差使波达方向(direction of arrival,DOA)估计精度下降的问题,提出了一种阵元幅相误差和DOA同时估计算法。该算法通过在阵列一侧设置少量已校正阵元,改变了误差矩阵的结构,并根据改变后的矩阵特征构造了变换矩阵,通过构...针对阵元幅相误差使波达方向(direction of arrival,DOA)估计精度下降的问题,提出了一种阵元幅相误差和DOA同时估计算法。该算法通过在阵列一侧设置少量已校正阵元,改变了误差矩阵的结构,并根据改变后的矩阵特征构造了变换矩阵,通过构造的变换矩阵和子空间算法,实现了对阵元幅相误差和DOA的同时估计。此外,该算法能够解决信源功率存在较大差异时误差估计不准的问题,实现了高精度的误差和角度的同时估计。计算机仿真结果证明了所提算法的正确性和有效性。展开更多
Antennas are an indispensable element in wireless networks. For long-distance wireless communication, antenna gains need to be very strong (highly directive) because the signal from the antenna loses a lot of str...Antennas are an indispensable element in wireless networks. For long-distance wireless communication, antenna gains need to be very strong (highly directive) because the signal from the antenna loses a lot of strength as it travels over long distances. This is true in the military with missile, radar, and satellite systems, etc. Antenna arrays are commonly employed to focus electromagnetic waves in a certain direction that cannot be achieved perfectly with a single-element antenna. The goal of this study is to design a rectangular microstrip high-gain 2 × 1 array antenna using ADS Momentum. This microstrip patch array design makes use of the RT-DUROID 5880 as a substrate with a dielectric constant of 2.2, substrate height of 1.588 mm, and tangent loss of 0.001. To achieve efficient gain and return loss characteristics for the proposed array antenna, RT-Duroid is a good choice of dielectric material. The designed array antenna is made up of two rectangular patches, which have a resonance frequency of 3.3 GHz. These rectangular patches are excited by microstrip feed lines with 13 mm lengths and 4.8 mm widths. The impedance of the patches is perfectly matched by these transmission lines, which helps to get better antenna characteristics. At a resonance frequency of 3.3 GHz, the suggested antenna array has a directivity of 10.50 dB and a maximum gain of 9.90 dB in the S-band. The S parameters, 3D radiation pattern, directivity, gain, and efficiency of the constructed array antenna are all available in ADS Momentum.展开更多
文摘针对阵元幅相误差使波达方向(direction of arrival,DOA)估计精度下降的问题,提出了一种阵元幅相误差和DOA同时估计算法。该算法通过在阵列一侧设置少量已校正阵元,改变了误差矩阵的结构,并根据改变后的矩阵特征构造了变换矩阵,通过构造的变换矩阵和子空间算法,实现了对阵元幅相误差和DOA的同时估计。此外,该算法能够解决信源功率存在较大差异时误差估计不准的问题,实现了高精度的误差和角度的同时估计。计算机仿真结果证明了所提算法的正确性和有效性。
文摘Antennas are an indispensable element in wireless networks. For long-distance wireless communication, antenna gains need to be very strong (highly directive) because the signal from the antenna loses a lot of strength as it travels over long distances. This is true in the military with missile, radar, and satellite systems, etc. Antenna arrays are commonly employed to focus electromagnetic waves in a certain direction that cannot be achieved perfectly with a single-element antenna. The goal of this study is to design a rectangular microstrip high-gain 2 × 1 array antenna using ADS Momentum. This microstrip patch array design makes use of the RT-DUROID 5880 as a substrate with a dielectric constant of 2.2, substrate height of 1.588 mm, and tangent loss of 0.001. To achieve efficient gain and return loss characteristics for the proposed array antenna, RT-Duroid is a good choice of dielectric material. The designed array antenna is made up of two rectangular patches, which have a resonance frequency of 3.3 GHz. These rectangular patches are excited by microstrip feed lines with 13 mm lengths and 4.8 mm widths. The impedance of the patches is perfectly matched by these transmission lines, which helps to get better antenna characteristics. At a resonance frequency of 3.3 GHz, the suggested antenna array has a directivity of 10.50 dB and a maximum gain of 9.90 dB in the S-band. The S parameters, 3D radiation pattern, directivity, gain, and efficiency of the constructed array antenna are all available in ADS Momentum.
