Bob Witte, Author at 5G Technology World https://www.5gtechnologyworld.com/author/bob-witte/ Covering 5G technology, systems, infrastructure and wireless design and development. Mon, 24 Jan 2022 17:10:58 +0000 en-US hourly 1 https://wordpress.org/?v=6.5.4 https://www.5gtechnologyworld.com/wp-content/uploads/2019/10/cropped-favicon-32x32.png Bob Witte, Author at 5G Technology World https://www.5gtechnologyworld.com/author/bob-witte/ 32 32 The CBRS band depends on spectrum management https://www.5gtechnologyworld.com/the-cbrs-band-depends-on-spectrum-management/ https://www.5gtechnologyworld.com/the-cbrs-band-depends-on-spectrum-management/#comments Tue, 11 Jan 2022 07:10:07 +0000 https://www.5gtechnologyworld.com/?p=17974 Spectrum sharing prevents cellular communications from interfering with existing military communications.

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]]> https://www.5gtechnologyworld.com/the-cbrs-band-depends-on-spectrum-management/feed/ 1 Measure in-band and adjacent channel power https://www.5gtechnologyworld.com/measure-in-band-and-adjacent-channel-power/ https://www.5gtechnologyworld.com/measure-in-band-and-adjacent-channel-power/#comments Tue, 07 Sep 2021 04:01:25 +0000 https://www.5gtechnologyworld.com/?p=17760 Spectrum analyzers let you see how distortion can affect transmitted RF signals.

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]]> https://www.5gtechnologyworld.com/measure-in-band-and-adjacent-channel-power/feed/ 1 Measure power in complex RF signals https://www.5gtechnologyworld.com/measure-power-in-complex-rf-signals/ https://www.5gtechnologyworld.com/measure-power-in-complex-rf-signals/#comments Wed, 16 Jun 2021 17:12:50 +0000 https://www.5gtechnologyworld.com/?p=17543 Average and peak power measurement require that you use a broadband or narrowband configuration.

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]]> https://www.5gtechnologyworld.com/measure-power-in-complex-rf-signals/feed/ 2 How Doherty Amplifiers improve PA efficiency https://www.5gtechnologyworld.com/how-doherty-amplifiers-improve-pa-efficiency/ https://www.5gtechnologyworld.com/how-doherty-amplifiers-improve-pa-efficiency/#comments Mon, 08 Mar 2021 05:01:38 +0000 https://www.5gtechnologyworld.com/?p=17283 An amplifier design from 1936 gets a revival by reducing power consumption in cellular radios.

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]]> https://www.5gtechnologyworld.com/how-doherty-amplifiers-improve-pa-efficiency/feed/ 1 Envelope tracking improves power amplifier efficiency https://www.5gtechnologyworld.com/envelope-tracking-improves-power-amplifier-efficiency/ https://www.5gtechnologyworld.com/envelope-tracking-improves-power-amplifier-efficiency/#respond Thu, 24 Dec 2020 18:17:42 +0000 https://www.5gtechnologyworld.com/?p=17147 RF power amplifiers consume lots of energy, which is a concern associated with 5G. Envelope tracking helps reduce power consumption but has tradeoffs.

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]]> https://www.5gtechnologyworld.com/envelope-tracking-improves-power-amplifier-efficiency/feed/ 0 How to calculate RF power amplifier efficiency https://www.5gtechnologyworld.com/how-to-calculate-rf-power_amplifier-efficiency/ https://www.5gtechnologyworld.com/how-to-calculate-rf-power_amplifier-efficiency/#respond Thu, 19 Nov 2020 01:24:42 +0000 https://www.5gtechnologyworld.com/?p=17094 5G brings higher data rates and a need for more efficient power amplifiers. Understand and calculate a PA’s efficiency. Radio communication systems steadily improve data rates and overall system performance. With that higher performance comes increasing pressure on power consumption. A recent industry report [Ref 1] concluded that power consumed by a typical 5G base…

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]]> https://www.5gtechnologyworld.com/how-to-calculate-rf-power_amplifier-efficiency/feed/ 0 Antenna elements combine in phased-array antennas https://www.5gtechnologyworld.com/antenna-elements-combine-in-phased-array-antennas/ https://www.5gtechnologyworld.com/antenna-elements-combine-in-phased-array-antennas/#comments Fri, 04 Sep 2020 06:30:21 +0000 https://www.5gtechnologyworld.com/?p=16932 Learn how to use patch antennas and phase shifting to create a phased-array antenna to steer RF signals.

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]]> https://www.5gtechnologyworld.com/antenna-elements-combine-in-phased-array-antennas/feed/ 1 More antennas, faster data transfer https://www.5gtechnologyworld.com/more-antennas-faster-data-transfer/ https://www.5gtechnologyworld.com/more-antennas-faster-data-transfer/#comments Tue, 07 Jul 2020 20:46:10 +0000 https://www.5gtechnologyworld.com/?p=16793 MIMO and beamforming provide increased data rates than you can get using single, omnidirectional signals. Antennas convert between radio waves propagating through space and electric currents moving in a metal conductor. In early communication system, antennas were often quite simple, perhaps just a half-wave dipole constructed of wire. We usually just had one antenna per…

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]]> https://www.5gtechnologyworld.com/more-antennas-faster-data-transfer/feed/ 1 OFDMA improves spectrum use in Wi-Fi 6 https://www.5gtechnologyworld.com/ofdma-improves-spectrum-use-in-wi-fi-6/ https://www.5gtechnologyworld.com/ofdma-improves-spectrum-use-in-wi-fi-6/#comments Thu, 04 Jun 2020 04:01:25 +0000 https://www.5gtechnologyworld.com/?p=16704 Orthogonal Frequency Division Multiple Access increases the efficiency of a crowded Wi-Fi channel. The access point is in control, managing who gets bandwidth and when.

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]]> https://www.5gtechnologyworld.com/ofdma-improves-spectrum-use-in-wi-fi-6/feed/ 2 The basics of 5G’s modulation, OFDM https://www.5gtechnologyworld.com/the-basics-of-5gs-modulation-ofdm/ https://www.5gtechnologyworld.com/the-basics-of-5gs-modulation-ofdm/#comments Thu, 16 Apr 2020 12:42:28 +0000 https://www.5gtechnologyworld.com/?p=16604 Orthogonal frequency-division multiplexing has become the standard modulation format for 5G New Radio. Lean how OFDM works and how it’s used.

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