Millimeter-Wave Multiplexed Wideband Wireless Link Using Rectangular-Coordinate Orthogonal Multiplexing (ROM) Antennas

Abstract

This paper is the first demonstration of multiplexed wideband data transmission in the millimeter-wave range using rectangular-coordinate orthogonal multiplexing (ROM) antennas. This spatial wireless multiplex communication method can be applied at several hundred GHz for further improvements in the data rate because much wider bandwidth is available and this multiplexing method does not require any signal processing. The multiplexing is achieved through the spatial eigenmodes of a novel antenna based on a rectangular coordinate system and magic-T which eliminates the need for computational signal processing efforts. The aperture distributions of these spatial eigenmodes are designed to have different polarities to avoid crosstalk and operate over a wide bandwidth range. We demonstrate their performance with four eigenmodes, achieving crosstalk between modes below −37.8 dB over a 14.6% relative bandwidth (57-66 GHz). We have introduced these antennas on a photonics-enabled real-time wireless data transmission, transmitting over two channels simultaneously, without any signal processing at the transmitter (multiplex) or the receiver (demultiplex). The two multiplexed channels show a total data rate up to 9.0 Gbps at most (5.875 Gbps and 3.125 Gbps for each channel) limited by the bandwidth of the low noise amplifiers at the receiver. The measured bit error rate (BER) is below the forward error correction (FEC) limit.

Concept of a photon spatial switch based on an off-axis zone plate: experimental confirmation in the millimeter waves range

“…Результаты экспериментов представлены на рис. Также при изменении длины волны излучения область локализации излучения (внеосевого фокуса [8,9]) изменяет свое пространственное положение. Размещение оптических приемников вдоль оси Z при X = 0 обеспечивает различную амплитуду поля в каждом из каналов при работе на различной частоте, т.е.…”

“…В данном случае пространственный наклон области ближнепольной фокусировки обеспечивался использованием внеосевой зонной пластины Вуда, область фокусировки которой находится вне оптической оси системы [21,22]. В качестве оптического элемента переключателя была использована асимметричная фотонная структура в виде внеосевой бинарной фазовой пластины (ФП) Вуда [8,9], представленная на рис. 2в.…”

Millimetre-wave Photonic Emitter Featuring a PIN-PD with WR-12 Output

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Design of a Four-Port Phase Control Antenna for Ku-Band Wave Detection Radar System Using Magic-T Circuit Structure

“…따라서 Ku-band의 넓은 대역폭 특성과 4-port 위상 조절 안테나 기술을 접목하여 높은 분해능 특성과 물리적 높이 조절 없이 위상 조절을 통해 다양한 각도에서 타겟 위치에 대 한 파도 빅데이터 수집이 가능한 안테나 설계 방법을 제 안한다. [4] .…”