A communications transceiver performs the task of converting digital or analog signals to RF, transmitting those signals, and receiving incoming signals for conversion back to digital or analog signals. Hence, the key components of a communications transceiver are the modulation\/demodulation circuitry, transmitter, and receiver. Depending on the architecture of the communications transceivers, direct digital synthesizers and direct digital converters may take the place of distinct modulation\/demodulation circuitry, upconverters, and local oscillators common to heterodyne transceiver architectures.<\/p>\n
Communications transceivers often have to transmit signals over vast distances, especially in space applications, and receive signals that are very weak and distorted by natural phenomenon. Hence, there are many key performance parameters that are used to describe the quality and other characteristics of transmitted and received signals delivered to the demodulator or converter.<\/p>\n
Key Communication Transceiver Performance Parameters:<\/p>\n
\u2022 Dynamic range (DR)
\n\u2022 Sensitivity
\n\u2022 Linearity
\n\u2022 Noise figure (NF)
\n\u2022 Phase noise
\n\u2022 Bandwidth
\n\u2022 Channel selectivity
\n\u2022 Power consumption
\n\u2022 Spurious frequencies effect
\n\u2022 Leakage effects
\n\u2022 Image band rejection
\n\u2022 Power efficiency
\n\u2022 Power control capability
\n\u2022 Transmitted signal power
\n\u2022 Working frequency and bandwidth
\n\u2022 Out-of-band emission, Adjacent Channel Power\/Adjacent Channel Power Ratio (ACP\/ACPR)
\n\u2022 Intermodulation distortion (IMD)<\/p>\n
Receiver Discussion<\/strong> Heterodyne Receiver Architecture Signal Chain Components<\/p>\n \u2022 Band Pass Filter Low-IF Receiver Architecture Signal Chain Components<\/p>\n \u2022 Mixer Direct Digital Conversion Receiver Architecture (Homodyne or Zero-IF) Signal Chain Components<\/p>\n \u2022 Low Noise Amplifier Transmitter Discussion<\/strong> Transmitter Architecture Signal Chain Components<\/p>\n \u2022 Duplexer Pasternack carries thousands of components and devices that are ideal for a wide range of transceiver systems, all with same-day shipping!<\/p>\n","protected":false},"excerpt":{"rendered":" A communications transceiver performs the task of converting digital or analog signals to RF, transmitting those signals, and receiving incoming signals for conversion back to digital or analog signals. Hence, the key components of a communications transceiver are the modulation\/demodulation circuitry, transmitter, and receiver. Depending on the architecture of the communications transceivers, direct digital synthesizers ..<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1696","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n
\nA transceiver\u2019s receiver takes potentially very weak incoming signals and amplifies those signals to desirable power levels for the demodulator or converter to process. Given that received signals are also naturally weakened and distorted by physical phenomenon innate to a radio link, a goal of communications receiver design is to minimize any additional distortion, noise, or phase noise caused by the receiver circuitry. This is why devices such as low noise amplifiers, low-phase noise amplifiers, and low noise\/jitter\/phase noise oscillators are commonly used in receiver signal chains.<\/p>\n
\n\u2022 Limiter
\n\u2022 Low Noise Amplifier (LNA)
\n\u2022 Image Reject (IR) Filter
\n\u2022 Mixer
\n\u2022 Local Oscillator
\n\u2022 Intermediate Frequency (IF) Filter or Channel Select Filter
\n\u2022 Power Splitter
\n\u2022 90 Degree Hybrid
\n\u2022 Low Pass Filter
\n\u2022 IQ Demodulator<\/p>\n
\n\u2022 90 Degree Hybrid
\n\u2022 Band Pass Filter
\n\u2022 IF Filter
\n\u2022 Local Oscillator
\n\u2022 Analog To Digital Converter (ADC)
\n\u2022 Power Splitter
\n\u2022 Power Combiner
\n\u2022 Low Pass Filter
\n\u2022 Low Noise Amplifier<\/p>\n
\n\u2022 Band Pass Filter
\n\u2022 Limiter
\n\u2022 Power Splitter
\n\u2022 90 Degree Hybrid
\n\u2022 Analog To Digital Converter<\/p>\n
\nA Transciever\u2019s transmitter section performs modulation, power amplification, and possibly upconversion depending on the frequencies and design. Most modern transmitters amplify quadrature baseband signals for transmission to an antenna. The key component of a communications transmitter is the power amplifier (PA) which greatly increases the signal power of the modulated transmission signal. The main considerations of the transmitter section are linearity, phase noise, out-of-band emissions, intermodulation distortion, power efficiency, spurious effects, transmitted signal power, and power control capability.<\/p>\n
\n\u2022 Switch
\n\u2022 Circulator
\n\u2022 Matching Network
\n\u2022 Power Amplifier (PA)
\n\u2022 Combiner
\n\u2022 Digital To Analog Converter (DAC) or IQ Modulator
\n\u2022 Antenna<\/p>\n