CN201259538Y - Power amplifier for meter wave instrument landing equipment - Google Patents
Power amplifier for meter wave instrument landing equipment Download PDFInfo
- Publication number
- CN201259538Y CN201259538Y CNU2008201422212U CN200820142221U CN201259538Y CN 201259538 Y CN201259538 Y CN 201259538Y CN U2008201422212 U CNU2008201422212 U CN U2008201422212U CN 200820142221 U CN200820142221 U CN 200820142221U CN 201259538 Y CN201259538 Y CN 201259538Y
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- power amplifier
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Abstract
The utility model relates to a power amplifier for meter wave instrument landing equipment; the circuit of the power amplifier adopts closed loop control mode to enable the power and phase position of the power amplifier to be adjustable within a wider range, and the power amplifier has output open circuit protection function and output short circuit protection function. The circuit connection relationship includes that: a RF input end is divided into two channels to be respectively connected with a RF modulation switch through fixed attenuators; the RF modulation switch, a pre-amplifier, a post two-stage amplifier, a forward-reverse wave detector, a feedback circuit and a signal superposition part form a closed loop; and an audio processing part is connected with the signal superposition part; the post two-stage amplifier is connected with a filter, and then connected with a CSB output port. The circuit connection of a SBO part is basically the same with that of the CSB, the difference between SBO and CSB includes that a phase modulation circuit is connected between the attenuators and the RF modulation switch. The power amplifier has the advantages that the power amplifier has wider power and phase position electric adjustment ranges; the harmonic suppression is better than minus 55dB; and the power amplifier has output open circuit and short circuit protection functions, high integration degree, convenient use and is reliable.
Description
Technical field
The utility model relates to a kind of power amplifier, particularly a kind of metric wave ILE power amplifier.
Background technology
Instrument landing system (ILS) is a kind of pacer approach aid that International Civil Aviation Organization determines, it can provide the guidance information of vertical and level for the aircraft of approach.ILS power amplifier working frequency range covers 108-112MHz (course) and 328-336MHz (downslide) respectively; Be used as carrier modulation transmitter (CSB) and sideband modulation transmitter (SBO), CSB and SBO phase association simultaneously.At present, existing power amplifier adopts the open loop amplification mode, and CSB and SBO are separate modules, and such working method shortcoming is that volume is big, power stability is poor, does not have open circuit protecting function, and phase place is non-adjustable.
Summary of the invention
For cooperating the development of domestic novel ILE, launch the ILS Designing power amplifier and make.According to the equipment needs, the ILS power amplifier should have following function: working frequency range covers 108-112MHz (course) and 328-336MHz (downslide) respectively; As carrier modulation transmitter (CSB) and sideband modulation transmitter (SBO), radio frequency output amplitude, depth of modulation and phase place all can be adjusted simultaneously.
In order to reach above-mentioned purpose of design, the technical scheme of taking is, metric wave ILE power amplifier, it is characterized in that: comprise attenuator, modulation switch, forward and reverse wave detector, pre-amplifier, back two-stage amplifier, wave filter, the signal superimposer, feedback circuit, audio process, phase modulation circuit, its circuit connecting relation is: rf inputs divides two-way to link to each other with the rf modulations switch by attenuator respectively, the rf modulations switch, pre-amplifier, back two-stage amplifier, forward and reverse wave detector, feedback circuit and signal overlapping portion form a closed loop, and Audio Processing links to each other with the signal superimposer, back two-stage is amplified by exporting to CSB respectively behind the wave filter, SBO output wherein is connected into phase modulation circuit in the middle of attenuator and modulation switch in the SBO output circuit.
Characteristics of the present utility model are: the utility model has reached design requirement, has power, the phase place setting range of broad, and clutter suppresses to be better than-55dB, and has output open circuit, short-circuit protection function, and the integrated level height is easy to use, reliable.
Description of drawings
Fig. 1 is a theory diagram of the present utility model, and as Figure of abstract.
Embodiment
The utility model is divided into the course, glides two kinds, but its principle of work and implementation are basic identical, it only is the difference of working frequency range, accompanying drawing below in conjunction with ILS modulation power amplifier, the course power amplifier is further specified, radiofrequency signal from frequency synthesizer is divided into two-way radio frequency 1 signal and radio frequency 2 signals, provides CSB and SBO modulation to amplify usefulness respectively, and both have fixing phase difference value.CSB is carrying out amplitude modulation(PAM) with signal and 1020 pairs of carrier signals of identification code and realize that its output setting range is 5-15W, the phase place relative fixed by " 90+150Hz ".SBO carries out sideband modulation by the difference signal of " 90-150 ", zero cross signal and phase voltage to carrier wave to amplify and realize that its output setting range is 0-1.5W, and phase place can be adjusted in 0-180 ° of scope.
The CSB transmitter comprises audio process, modulator, power amplifier, wave filter, feedback circuit.RF1 inputs to fixing attenuator, inputs to the rf modulations switch after being reduced to a suitable value,, uses double balanced mixer to reach modulation and switching purposes here.Modulation signal and direct current biasing are added the intermediate frequency end of frequency mixer together, make its imbalance, balanced mixer just can be used as amplitude modulaor.But this method can reduce the isolation of Lo/RF, for the carrier leak that guarantees to export, selects the frequency mixer of high-isolation as far as possible.Another characteristics of balanced mixer are to hold to R end at L to provide a variable isolation and decay, the transition function between these two ports to be decided by to flow through the DC current of I end.When the I end does not have direct current to flow through, there is bigger decay, when Control current increased to 20mA, decay can be reduced to 3dB.Control IF end input voltage/electric current can be finished the power adjustment.Power amplification is formed by three grades, and prime reaches the Motorola small-signal amplification module of 35dB for gaining, and back two is the enhancement mode metal-oxide-semiconductor of ASI very, and adjustable for guaranteeing output power, its quiescent point should be selected in the range of linearity.Filtering circuit is by inductance, and electric capacity is formed, and inductance adopts hollow wire-wound inductance, helps the circuit adjustment.This wave filter is a bandpass filter, clutter and each harmonic beyond the filtering frequency of operation.Feedback circuit mainly is forward, reverse directional coupler, wave detector, and amplifier is formed.The signal of coupling through the detector diode detection go out direct current and (90+150) signal of HZ send amplifier to handle, separated into two parts, a part is synthesized with the sound signal of input and is controlled output power, another part is used for power monitoring.Circuit selects for use poly-tetrafluoro sheet material to design, and is stable and reliable for performance.
RF2 passes through fixed attenuator, rf modulations switch equally, and two-stage amplification etc. are to reach the output SBO power that needs.Different is that SBO is the sideband modulation mode, finish by zero cross signal and analog switch, between attenuator and rf modulations switch, phase-control circuit is arranged in addition, mainly be to finish by varactor, when adding the phase voltage change, varactor appearance value changes thereupon, according to four port networks as can be known, radio-frequency (RF) phse also changes simultaneously, and phase changing capacity is greater than 180 ° in the real work.
Claims (1)
1. metric wave ILE power amplifier, it is characterized in that: comprise attenuator, modulation switch, forward and reverse wave detector, pre-amplifier, back two-stage amplifier, wave filter, the signal superimposer, feedback circuit, audio process, phase modulation circuit, its circuit is connected to: rf inputs divides two-way to link to each other with the rf modulations switch by attenuator respectively, the rf modulations switch, pre-amplifier, back two-stage amplifier, forward and reverse wave detector, feedback circuit and signal overlapping portion form a closed loop, and Audio Processing links to each other with the signal superimposer, back two-stage is amplified by exporting to CSB respectively behind the wave filter, SBO output wherein is connected into phase modulation circuit in the middle of attenuator and modulation switch in the SBO output circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201422212U CN201259538Y (en) | 2008-09-26 | 2008-09-26 | Power amplifier for meter wave instrument landing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201422212U CN201259538Y (en) | 2008-09-26 | 2008-09-26 | Power amplifier for meter wave instrument landing equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201259538Y true CN201259538Y (en) | 2009-06-17 |
Family
ID=40773776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201422212U Expired - Lifetime CN201259538Y (en) | 2008-09-26 | 2008-09-26 | Power amplifier for meter wave instrument landing equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201259538Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917173A (en) * | 2010-07-29 | 2010-12-15 | 天津七六四通信导航技术有限公司 | Medium-wave harmonic filter |
| CN117872260A (en) * | 2024-03-13 | 2024-04-12 | 天津七六四通信导航技术有限公司 | Digital generation method, system, equipment and medium of instrument landing standard signal |
| CN117872259A (en) * | 2024-03-13 | 2024-04-12 | 天津七六四通信导航技术有限公司 | Method and system for processing sliding monitoring signal in instrument landing system |
-
2008
- 2008-09-26 CN CNU2008201422212U patent/CN201259538Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917173A (en) * | 2010-07-29 | 2010-12-15 | 天津七六四通信导航技术有限公司 | Medium-wave harmonic filter |
| CN101917173B (en) * | 2010-07-29 | 2012-11-28 | 天津七六四通信导航技术有限公司 | Medium-wave harmonic filter |
| CN117872260A (en) * | 2024-03-13 | 2024-04-12 | 天津七六四通信导航技术有限公司 | Digital generation method, system, equipment and medium of instrument landing standard signal |
| CN117872259A (en) * | 2024-03-13 | 2024-04-12 | 天津七六四通信导航技术有限公司 | Method and system for processing sliding monitoring signal in instrument landing system |
| CN117872259B (en) * | 2024-03-13 | 2024-06-11 | 天津七六四通信导航技术有限公司 | Method and system for processing sliding monitoring signal in instrument landing system |
| CN117872260B (en) * | 2024-03-13 | 2024-06-11 | 天津七六四通信导航技术有限公司 | Digital generation method, system, equipment and medium of instrument landing standard signal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090617 |
|
| CX01 | Expiry of patent term |